Hellenic Statistical Authority (ELSTAT)

Division of Population and Labour Market Statistics / Censuses and Population Status Section

46 Pireos & Eponiton str.

185.10 Piraeus

Greece

The Population and Housing Censuses collect statistical data on the main characteristics of dwellings, the number and composition of households and nuclear families, as well as on the demographic, social, educational and economic characteristics of the resident population of the Country. The survey unit is the residential dwelling and the individual. The Population-Housing census was conducted in all the Member States in a harmonized manner. The characteristics of the census are laid down in Community legislation. The aggregate results are released and presented in statistical tables up to the level of the Department (NUTS 3).

NACE REV 2, ISCO 08, ISCED 97, NUTS , LAU ,

Classification of the countries pursuant to Regulation 763/2008 of the European Parliament and of the Council

The Population and Housing census was conducted all over Greece and it covered all the branches of economic activity of NACE REV2 (3-digit level), all the professions of ISCO 08 (4-digit level), all the levels of ISCED (1-6) and at the following geographical levels: NUTS 1-3 and LAU 1-2

Persons usually resident in the place of enumeration but absent, or expected to be absent, at the time of the census for less than one year shall be considered as temporarily absent persons and thus included in the total unsually population. In contrast, persons living or expected to live outside the place of enumeration for one year or more shall not be considered temporarily absent and shall therefore be excluded from the total population. This is regardless of the length of visits that they may pay to their families from time to time.
Persons who are enumerated but do not meet the criteria for usual residence in the place of enumeration, i.e. do not live or do not expect to live in the place of enumeration for a continuous period of at least 12 months, are considered temporarily present and are therefore not counted in the total usually resident population.

MALE/FEMALE

A person shall be classified according to his/her most recently acquired legal marital status at the reference date.
'Registered partnerships' are legally based and they are reported :
(a) lead to legal conjugal obligations between two persons;
(b) are not marriages;
(c) prevent persons to commit themselves into multiple partnerships with different partners.
In countries where the legislation includes provisions for married partners to be 'legally separated', such 'legally separated' persons are classified under 'married'.

The relevant legal basis in Greece concerning marriages and the conditions in which married couples can divorce or legally separate is the Civil Code. In Greece only opposite-sex marriages are allowed. The minimum age for marriages is 18 years old otherwise (for younger people) court order and parents' agreement are necessary.

Registered partneship is established with a law (3719/2008) of 2008. It is foreseen only for opposite-sex partneships.

Child (son/daughter) refers to a blood, step- or adopted son or daughter (regardless of age or marital status) who has usual residence in the household of at least one of the parents, and who has no partner or own children in the same household. Foster children are not included. A son or daughter who lives with a spouse, with a registered partner, with a partner in a consensual union, or with one or more own children, is not considered to be a child. A child who alternates between two households (for instance if his or her parents are divorced) shall consider the one where he or she spends the majority of the time as his or her household. Where an equal amount of time is spent with both parents the household shall be the one where the child is found at the time on census night.
The term couple shall include married couples, couples in registered partnerships, and couples who live in a consensual union.
Registered partnerships are reported only by countries that have a legal framework regulating partnerships that:
(a) lead to legal conjugal obligations between two persons;
(b) are not marriages;
(c) prevent persons to commit themselves into multiple partnerships with different partners.
Two persons are considered to be partners in a 'consensual union' when they
— belong to the same household, and
— have a marriage-like relationship with each other, and
— are not married to or in a registered partnership with each other.
'Skip-generation households' (households consisting of a grandparent or grandparents and one or more grandchildren, but no parent of those grandchildren) are not included in the definition of a family.

The household-dwelling concept considers all persons living in a housing unit to be members of the same household, such that there is one household per occupied housing unit. In the household dwelling concept, then, the number of occupied housing units and the number of households occupying them is equal, and the locations of the housing units and house­ holds are identical.
The category 'Persons living in a private household' comprises 'Persons in a family nucleus' and 'Persons not in a family nucleus'. The category 'Persons in a family nucleus' comprises all persons who belong to a private household that contains a family nucleus of which they are a member. 'Persons not in a family nucleus' comprises all persons who either belong to a non-family household or to a family household without being member of any family nucleus in that household.
A non-family household can be a one-person household ('Living alone') or a multiperson household without any family nucleus. The category 'Not living alone' comprises persons that live either in a multiperson household without any family nucleus or in a family household without being member of any family nucleus in that household. Persons who belong to a skip-generation household and who are not member of any family nucleus in that household shall be classified in the optional category 'Persons living in a household with relative(s)'.
The term 'son/daughter' is defined as the term 'child' in the technical specifications for the topic 'Family status'. 'Husband/wife couple' means a married opposite-sex couple.
'Registered partnership' is defined as in the technical specifications for the topic 'Legal marital status'. 'Consensual union' is defined as in the technical specifications for the topic 'Family status'.
The category 'Partners' comprises 'Persons in a married couple', 'Partners in a registered partnership' and 'Partners in a consensual union'.
'Primary homeless persons' are persons living in the streets without a shelter that would fall within the scope of living quarters as defined in the technical specifications for the topic 'Type of living quarters'

Current activity status' is the current relationship of a person to economic activity, based on a reference period of one week, which may be either a specified, recent, fixed, calendar week, or the last complete calendar week, or the last seven days prior to enumeration.
The 'currently economically active population' comprises all persons who fulfil the requirements for inclusion among the employed or the unemployed.
'Employed' persons comprise all persons aged 15 years or over who during the reference week:
(a) performed at least one hour of work for pay or profit, in cash or in kind, or
(b) were temporarily absent from a job in which they had already worked and to which they maintained a formal attachment, or from a self-employment activity.
The 'unemployed' comprise all persons aged 15 years or over who were:
(a) 'without work', that is, were not in wage employment or self-employment during the reference week; and
(b) 'currently available for work', that is, were available for wage employment or self-employment during the reference week and for two weeks after that; and
(c) 'seeking work', that is, had taken specific steps to seek wage employment or self-employment within four weeks ending with the reference week.
The category 'Currently not economically active' includes persons below the national minimum age for economic activity.
In ascribing a single activity status to each person, priority is given to the status of 'employed' in preference to 'unemployed', and to the status of 'unemployed' in preference to 'not economically active'.

The category 'Currently not economically active' also includes persons persons 15 years old and older who were not employed or unemployed (e.g., students, retired, housewives etc)

Occupation' refers to the type of work done in a job (that is the main tasks and duties of the work). Persons doing more than one job are allocated an occupation based on their main job, which is identified according to the time spent on the job or, if not available, to the income received.
The breakdown by occupation is available for persons aged 15 or over that were:
— employed during the reference week, or
— unemployed during the reference week, but have ever been in employment
Persons are classified according to the occupation they had during their most recent employment. The categories included in the breakdown 'occupation' correspond to the major groups of the ISCO-08 (COM) classification.
Persons under the age of 15 years, as well as persons aged 15 or over that were:
— not economically active during the reference week, or
— unemployed, never worked before (i.e. they have never been employed in their lives)
are classified under 'not applicable'.
The allocation of a person within the breakdowns of the topics 'Occupation', 'Industry' and 'Status in employment' is based on the same job.

Industry (branch of economic activity) is the kind of production or activity of the establishment (or similar unit) in which the job of a currently economically active person is located.
Persons doing more than one job shall be allocated an industry (branch of economic activity) based on their main job, which is to be identified according to the time spent on the job or (if not available) the income received.
The breakdown by industry is available for persons aged 15 or over that were:
— employed during the reference week, or
— unemployed during the reference week, but have ever been in employment
Persons are classified according to the industry they worked in during their most recent employment. The categories included in the breakdown 'industry' list the 21 sections of the NACE Rev. 2 classification and appropriate aggregates.
Persons under the age of 15 years, as well as persons aged 15 or over that were:
— not economically active during the reference week, or
— unemployed, and have never worked before (i.e. have never been employed in their lives)
are classified under 'not applicable'.
The allocation of a person within the breakdowns of the topics 'Occupation', 'Industry' and 'Status in employment' is based on the same job.

An 'employee' is a person who works in a 'paid employment' job, that is a job where the explicit or implicit contract of employment gives the incumbent a basic remuneration, which is independent of the revenue of the unit for which he/she works.
An 'employer' is a person who, working on his or her own account or with a small number of partners, holds a 'self-employment' job and, in this capacity, on a continuous basis (including the reference week) has engaged one or more persons to work for him/her as 'employees'.
If a person is both employer and employee, he/she shall be allocated to only one group according to the time spent on the job or (if not available) the income received.
An 'own-account worker' is a person who, working on his/her own account or with one or a few partners, holds a 'self-employment job' and has not engaged, on a continuous basis (including the reference week), any 'employees'.
A 'contributing family worker' is a person who
— holds a 'self-employment’ job in a market-oriented establishment operated by a related person, living in the same household, and
— cannot be regarded as a partner (that is an employer or own-account worker) because the degree of commitment to the operation of the establishment, in terms of working time or other factors to be determined by national circumstances, is not at a level comparable to that of the head of the establishment.
A 'member of a producers' cooperative' is a person who holds a 'self-employment' job in an establishment organised as a coop­ erative, in which each member takes part on an equal footing with other members in determining the organisation of production, sales and/or other work, the investments and the distribution of the proceeds among the members.

The location of the place of work is the geographical area in which a currently employed person does his/her job.
The place of work of those mostly working at home is the same as their usual residence. The term 'working' refers to work done as an 'employed person' as defined under the topic 'Current activity status'. 'Mostly' working at home means that the person spends all or most of the time working at home, and less, or no, time in a place of work other than at home.

'Educational attainment' refers to the highest level successfully completed in the educational system of the country where the education was received. All education which is relevant to the completion of a level is taken into account even if this was provided outside schools and universities.
Persons aged 15 years or over are classified under only one of the categories according to their educational attainment (highest completed level). Persons under the age of 15 years are classified under 'not applicable'.

A locality is defined as a distinct population cluster, that is an area defined by population living in neighbouring or contiguous buildings. Such buildings may either:
(a) form a continuous built-up area with a clearly recognisable street formation; or
(b) though not part of such a built-up area, comprise a group of buildings to which a locally recognised place name is uniquely attached; or
(c) though not meeting either of the above two criteria, constitute a group of buildings, none of which is separated from its nearest neighbour by more than 200 metres.

Place of birth is defined as the place of usual residence of the mother at the time of the birth, or, if not available, as the place in which the birth took place.
Information on the country of birth is based on the international boundaries existing on 1 January 2011. 'EU Member State', in particular, means a country that is a member of the European Union on 1 January 2011. The list of countries in the breakdown 'country/place of birth' serves only for statistical purposes.
For reporting countries that are EU Member States, the sub-category under the category 'other EU Member State' that refers to their Member State does not apply. For reporting countries that are not EU Member States, the category 'Other EU Member State' shall be read as 'EU Member State'.
The category 'Information not classifiable according to current borders' covers those persons whose country of birth existed at the time of the birth, but no longer exists at the time of the census, and who cannot be allocated uniquely to one country existing at the time of the census, i.e. according to current borders.
The category 'outside any country' covers persons for whom the usual residence of the mother at the time of the birth is not known and who where born outside the borders of any country, for example at sea or in the air.

Citizenship is defined as the particular legal bond between an individual and his/her State, acquired by birth or naturalisation, whether by declaration, option, marriage or other means according to the national legislation.
A person with two or more citizenships is allocated to only one country of citizenship, to be determined in the following order of precedence:
1. reporting country; or
2. if the person does not have the citizenship of the reporting country: other EU Member State; 3. if the person does not have the citizenship of another EU Member State: other country outside the European Union.
'EU Member State' means a country that is a member of the European Union on 1 January 2011. The list of countries in the breakdown 'Country of citizenship' shall only apply for statistical purposes.
For reporting countries that are EU Member States, the sub-category of the category 'citizenship not of reporting country, but other EU Member State' that refers to their Member State does not apply. For reporting countries that are not EU Member States, the category 'citizenship not of reporting country, but other EU Member State' shall be changed to 'citizenship of an EU Member State'.
Persons who are neither citizens of any country nor stateless and who have some but not all of the rights and duties associated with citizenship are classified under 'recognised non-citizens'.

The year of arrival is the calendar year in which a person most recently established usual residence in the country. The data for 2011 refer to the time span between 1 January 2011 and the reference date.

This indicates the relationship between the current place of usual residence and the place of usual residence one year prior to the census. Children under one year of age are classified under 'Not applicable'.
For all persons that have changed their usual residence more than once within the year prior to the reference date, the previous place of usual residence is the last usual residence from which they moved to their current place of usual residence.

The topic 'Housing arrangements' covers the whole population and refers to the type of housing in which a person usually resides at the time of the census. This covers all persons who are usual residents in different types of living quarters, or who do not have a usual residence and stay temporarily in some type of living quarters, or who are roofless, sleeping rough or in emergency shelters, when the census is taken.
Occupants are persons with their usual residence in the places listed in the respective category.
'Conventional dwellings' are structurally separate and independent premises at fixed locations which are designed for permanent human habitation and are, at the reference date, either used as a residence, or vacant, or reserved for seasonal or secondary use.
'Separate' means surrounded by walls and covered by a roof or ceiling so that one or more persons can isolate themselves. 'Independent' means having direct access from a street or a staircase, passage, gallery or grounds.
'Other housing units' are huts, cabins, shacks, shanties, caravans, houseboats, barns, mills, caves or any other shelter used for human habitation at the time of the census, irrespective if it was designed for human habitation.
'Collective living quarters' are premises which are designed for habitation by large groups of individuals or several households and which are used as the usual residence of at least one person at the time of the census.
'Occupied conventional dwellings', 'other housing units' and 'collective living quarters' together represent'‘living quarters'. Any 'living quarter' must be the usual residence of at least one person.
The sum of occupied conventional dwellings and other housing units represents 'housing units'.
The homeless (persons who are not usual residents in any living quarter category) can be persons living in the streets without a shelter that would fall within the scope of living quarters (primary homelessness) or persons moving frequently between temporary accommodation (secondary homelessness).

The family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife, as partners in a registered partnership, as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children.
Child (son/daughter) refers to a blood, step- or adopted son or daughter (regardless of age or marital status) who has usual residence in the household of at least one of the parents, and who has no partner or own children in the same household. Foster children are not included. A son or daughter who lives with a spouse, with a registered partner, with a partner in a consensual union, or with one or more own children, is not considered to be a child. A child who alternates between two households (for instance if his or her parents are divorced) shall consider the one where he or she spends the majority of the time as his or her household. Where an equal amount of time is spent with both parents the household shall be the one where the child is found at the time on census night.
The term couple shall include married couples, couples in registered partnerships, and couples who live in a consensual union.
Registered partnerships are reported only by countries that have a legal framework regulating partnerships that:
(a) lead to legal conjugal obligations between two persons;
(b) are not marriages;
(c) prevent persons to commit themselves into multiple partnerships with different partners.
Two persons are considered to be partners in a 'consensual union' when they
— belong to the same household, and
— have a marriage-like relationship with each other, and
— are not married to or in a registered partnership with each other.
'Skip-generation households' (households consisting of a grandparent or grandparents and one or more grandchildren, but no parent of those grandchildren) are not included in the definition of a family.

The family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife, as partners in a registered partnership, as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children.
Child (son/daughter) refers to a blood, step- or adopted son or daughter (regardless of age or marital status) who has usual residence in the household of at least one of the parents, and who has no partner or own children in the same household. Foster children are not included. A son or daughter who lives with a spouse, with a registered partner, with a partner in a consensual union, or with one or more own children, is not considered to be a child. A child who alternates between two households (for instance if his or her parents are divorced) shall consider the one where he or she spends the majority of the time as his or her household. Where an equal amount of time is spent with both parents the household shall be the one where the child is found at the time on census night.
The term couple shall include married couples, couples in registered partnerships, and couples who live in a consensual union.
Registered partnerships are reported only by countries that have a legal framework regulating partnerships that:
(a) lead to legal conjugal obligations between two persons;
(b) are not marriages;
(c) prevent persons to commit themselves into multiple partnerships with different partners.
Two persons are considered to be partners in a 'consensual union' when they
— belong to the same household, and
— have a marriage-like relationship with each other, and
— are not married to or in a registered partnership with each other.
'Skip-generation households' (households consisting of a grandparent or grandparents and one or more grandchildren, but no parent of those grandchildren) are not included in the definition of a family.

Household-dwelling concept
The household-dwelling concept considers all persons living in a housing unit to be members of the same household, such that there is one household per occupied housing unit. In the household dwelling concept, then, the number of occupied housing units and the number of households occupying them is equal, and the locations of the housing units and house­ holds are identical.
The category 'Persons living in a private household' comprises 'Persons in a family nucleus' and 'Persons not in a family nucleus'. The category 'Persons in a family nucleus' comprises all persons who belong to a private household that contains a family nucleus of which they are a member. 'Persons not in a family nucleus' comprises all persons who either belong to a non-family household or to a family household without being member of any family nucleus in that household.
A non-family household can be a one-person household ('Living alone') or a multiperson household without any family nucleus. The category 'Not living alone' comprises persons that live either in a multiperson household without any family nucleus or in a family household without being member of any family nucleus in that household. Persons who belong to a skip-generation household and who are not member of any family nucleus in that household shall be classified in the optional category 'Persons living in a household with relative(s)'.
The term 'son/daughter' is defined as the term 'child' in the technical specifications for the topic 'Family status'. 'Husband/wife couple' means a married opposite-sex couple.
'Registered partnership' is defined as in the technical specifications for the topic 'Legal marital status'. 'Consensual union' is defined as in the technical specifications for the topic 'Family status'.
The category 'Partners' comprises 'Persons in a married couple', 'Partners in a registered partnership' and 'Partners in a consensual union'.
'Primary homeless persons' are persons living in the streets without a shelter that would fall within the scope of living quarters as defined in the technical specifications for the topic 'Type of living quarters'.

Household-dwelling concept
The household-dwelling concept considers all persons living in a housing unit to be members of the same household, such that there is one household per occupied housing unit. In the household dwelling concept, then, the number of occupied housing units and the number of households occupying them is equal, and the locations of the housing units and house­ holds are identical.
The category 'Persons living in a private household' comprises 'Persons in a family nucleus' and 'Persons not in a family nucleus'. The category 'Persons in a family nucleus' comprises all persons who belong to a private household that contains a family nucleus of which they are a member. 'Persons not in a family nucleus' comprises all persons who either belong to a non-family household or to a family household without being member of any family nucleus in that household.
A non-family household can be a one-person household ('Living alone') or a multiperson household without any family nucleus. The category 'Not living alone' comprises persons that live either in a multiperson household without any family nucleus or in a family household without being member of any family nucleus in that household. Persons who belong to a skip-generation household and who are not member of any family nucleus in that household shall be classified in the optional category 'Persons living in a household with relative(s)'.
The term 'son/daughter' is defined as the term 'child' in the technical specifications for the topic 'Family status'. 'Husband/wife couple' means a married opposite-sex couple.
'Registered partnership' is defined as in the technical specifications for the topic 'Legal marital status'. 'Consensual union' is defined as in the technical specifications for the topic 'Family status'.
The category 'Partners' comprises 'Persons in a married couple', 'Partners in a registered partnership' and 'Partners in a consensual union'.
'Primary homeless persons' are persons living in the streets without a shelter that would fall within the scope of living quarters as defined in the technical specifications for the topic 'Type of living quarters'.

The topic 'Tenure status of households' refers to the arrangements under which a private household occupies all or part of a housing unit.
Households that are in the process of paying off a mortgage on the housing unit in which they live or purchasing their housing unit over time under other financial arrangementsare classified under 'Households of which at least one member is the owner of the housing unit'.
Households of which at least one member is the owner of the housing unit and at least one member tenant of all or part of the housing unit are classified under category 'Households of which at least one member is the owner of the housing unit'.

'Conventional dwellings' are structurally separate and independent premises at fixed locations which are designed for permanent human habitation and are, at the reference date, either used as a residence, or vacant, or reserved for seasonal or secondary use.
'Separate' means surrounded by walls and covered by a roof or ceiling so that one or more persons can isolate themselves. 'Independent' means having direct access from a street or a staircase, passage, gallery or grounds.
'Other housing units' are huts, cabins, shacks, shanties, caravans, houseboats, barns, mills, caves or any other shelter used for human habitation at the time of the census, irrespective if it was designed for human habitation.
'Collective living quarters' are premises which are designed for habitation by large groups of individuals or several households and which are used as the usual residence of at least one person at the time of the census.
'Occupied conventional dwellings', 'other housing units' and 'collective living quarters' together represent'‘living quarters'. Any 'living quarter' must be the usual residence of at least one person.

'Occupied conventional dwellings' are conventional dwellings which are the usual residence of one or more persons at the time of the census. 'Unoccupied conventional dwellings' are conventional dwellings which are not the usual residence of any person at the time of the census.
Conventional dwellings with persons present but not included in the census are classified under the category 'Dwellings reserved for seasonal or secondary use'.

The topic 'Type of ownership' refers to the ownership of the dwelling and not to that of the land on which the dwelling stands.
'Owner-occupied dwellings' are those where at least one occupant of the dwelling owns parts or the whole of the dwelling. 'Cooperative ownership' refers to ownership within the framework of a housing cooperative.
'Rented dwellings' are those where at least one occupant pays a rent for the occupation of the dwelling, and where no occupant owns parts or the whole of the dwelling.

The number of occupants of a housing unit is the number of people for whom the housing unit is the usual residence.

Useful floor space is defined as the floor space measured inside the outer walls excluding non-habitable cellars and attics and, in multi-dwelling buildings, all common spaces; or the total floor space of rooms falling under the concept of 'room'.
A 'room' is defined as a space in a housing unit enclosed by walls reaching from the floor to the ceiling or roof, of a size large enough to hold a bed for an adult (4 square metres at least) and at least 2 metres high over the major area of the ceiling.

A 'room' is defined as a space in a housing unit enclosed by walls reaching from the floor to the ceiling or roof, of a size large enough to hold a bed for an adult (4 square metres at least) and at least 2 metres high over the major area of the ceiling.

Data report on the density standard measured by the 'useful floor space'.

Data report on the density standard measured by the 'useful floor space'.

A bathing facility is any facility designed to wash the whole body and includes shower facilities.

A housing unit is considered as centrally heated if heating is provided either from a community heating centre or from an installation built in the building or in the housing unit, established for heating purposes, without regard to the source of energy.

The topic 'Dwellings by type of building' refers to the number of dwellings in the building in which the dwelling is placed.

The topic 'Dwellings by period of construction' refers to the year when the building in which the dwelling is placed was completed.

The statistical units are: the residential dwelling, the inhabited collective living quarter and the resident.

For every residential dwelling data are collected for its geographical position, the type (conventional, non-conventional) the characteristics of the conventional dwelling (status and type of building, period of construction) amenities of the dwelling (useful floor space of the dwelling, number of rooms, water supply system, bathing or shower facilities, toilet or WC, heating), as well as tenure status.

For each resident data are collected on the gender, date of birth, legal marital status, place of birth, country of citizenship, previous usual residence at NUTS 3 level, previous usual residence in a foreign country, educational level, recent activity status and branch of economic activity, profession, employment status and place of work.

Persons enumerated in the 2011 census are those who were usually resident in the territory of the reporting country at the census reference date. Usual residence means the place where a person normally spends the daily period of rest, regardless of temporary absences for purposes of recreation, holidays, visits to friends and relatives, business, medical treatment or religious pilgrimage.

The reference population of the data are all the statistical units referred to in item 3.5 and are located within the boundaries of Greece.

The Population-Housing Census was conducted all over Greece and at the following levels: 5 Great Geographic Areas (NUTS 1), 14 Regions (NUTS 2), 52 Departments (NUTS 3) and 6,130 Municipal/Local Departments (LAU 2).

The data of the Population-Housing Census are released every ten years. The most recent available data are the data of the Population and Housing Census which was conduced in 2001.

Not applicable.

Four units of measure are used: the number of dwellings, the number of households, the number of nuclear families and the number of individuals.

The legal framework concerning the organization and operation of ELSTAT is as follows:

1.      Law 3832/2010 (Government Gazette No 38, Issue Α): "Hellenic Statistical System Establishment of the Hellenic Statistical Authority (ELSTAT) as an Independent Authority", as amended and in force.

2.      Regulation (EC) No 223/2009 of the European Parliament and of the Council, on the European statistics (Official Journal of the European Union L 87/164)

3.      Article 14 of the Law 3470/2006 (Government Gazette No 132, Issue A): “National Export Council, tax regulations and other provisions”.

4.      Article 3, paragraph 1c, of the Law 3448/2006 (Government Gazette No 57, Issue A): “For the further use of information coming from the public sector and the settlement of matters falling within the responsibility of the Ministry of Interior, Public Administration and Decentralization”.

5.      European Statistics Code of Practice adopted by the Statistical Programme Committee on 24 February 2005 and promulgated in the Commission Recommendation of 25 May 2005 on the independence, integrity and accountability of the national and Community statistical Authorities, after its revision, which was adopted on 28 September 2011 by the European Statistical System Committee.

6.      Presidential Decree 226/2000 (Government Gazette No 195, Issue Α): “Organization of the General Secretariat of the National Statistical Service of Greece”.

 7.      Decision No ΓΠ–400/27-8-2012 on the “Regulation on the Operation and Administration of the Hellenic Statistical Authority (ELSTAT), 2012, (Government Gazette No 2390, Issue B, 28-8-2012)

 8.      Articles 4, 12, 13, 14, 15 and 16 of the Law 2392/1996 (Government Gazette No 60, Issue Α): "Access of the General Secretariat of the National Statistical Service of Greece to administrative sources and administrative files, Statistical Confidentiality Committee, settlement of matters concerning the conduct of censuses and statistical works, as well as of matters of the General Secretariat of the National Statistical Service of Greece"

 The national legal framework for the conduct of the 2011 Population and housing Census is as follows:

1.       Presidential Decree No168/2008 (Government Gazette 223/Α΄/04.11.2008) «Conduct of General Censuses of Buildings and Population –Housing for the years 2010-2011».

2.       Joint Ministerial Decision No 1524/Γ5-473/2011 (Government Gazette 425/Β΄/17.03.2011) «Notice for the Conduct of the General Censuses of Buildings and Population –Housing for the years 2010-2011»

3.       Joint Ministerial Decision No 3794/Γ5-1070/2011 (Government Gazette 783/Β΄/9.05.2011) «Amendment and completion of the Decision No 1524/Γ5-473/14.02.2011 (425/Β΄/17.03.2011) Notice for the Conduct of the General Censuses of Buildings and Population –Housing for the years 2010-2011».

4.       Τhe Law No 3852/2010 «New architecture of Self government and the Decentralized Administration – Kallikratis Plan» (Government Gazette 87/Α΄/7.06.2010), as in force on 9 May 2011, reference date of the 2011 Population and Housing Census, replacing the Law 2539/1997 «Establishment of the Local Government of First Degree » (Government Gazette 244/Α΄/4.12.1997)

5.       Legislative Act on the  «Conduct of Population and Housing Census » (Government Gazette 106/Α΄/9.05.2011). 

6.       Law No 3995/2011 ratifying the Legislative Act on the «Conduct of Population and Housing Census »  (Government Gazette 166/Α΄/25.07.2011).

Hellenic Statistical Authority (ELSTAT)

Regulation No 763/2008 of the European Parliament and the Council concerning population and housing census

The issues concerning the observance of statistical confidentiality by the Hellenic Statistical Authority are arranged by articles 7, 8 and 9 of the Law 3832/2010 as in force, by Articles 8, 10 and 11(2) of the Regulation on Statistical Obligations of the agencies of the Hellenic Statistical System and by Articles 10 and 15 of the Regulation on the Operation and Administration of ELSTAT.

ELSTAT protects and does not disseminate data it has obtained or it has access to, which enable the direct or indirect identification of the statistical units that have provided them by the disclosure of individual information directly received for statistical purposes or indirectly supplied from administrative or other sources.

ELSTAT takes all appropriate preventive measures so as to render impossible the identification of individual statistical units by technical or other means that might reasonably be used by a third party. Statistical data that could potentially enable the identification of the statistical unit are disseminated by ELSTAT if and only if these data have been treated, as it is specifically set out in the Regulation on Statistical Obligations of the agencies of the Hellenic Statistical System (ELSS), in such a way that their dissemination does not prejudice statistical confidentiality.

Issues referring to the observance of statistical confidentiality are examined by the Statistical Confidentiality Committee (SCC) operating in ELSTAT. The responsibilities of this Committee are to make recommendations to the President of ELSTAT on:

• the level of detail at which statistical data can be disseminated, so as the identification,     either directly or indirectly, of the surveyed statistical unit is not possible;
• the anonymization criteria for the microdata provided to users;

the granting to researchers access to confidential data for scientific purposes.

Data are made available 27 months after the end of the reference period (March 2014)

Users have direct access to the results of the 2011 Population-Housing Census through the official portal of ELSTAT.

The results of the Census are disseminated every tens years.

On 2.4.2014 a Press Released was published concerning revised data for Resident Population and other Press Releases are scheduled to be published containing analytical data for all the other variables.

A special publication for the results of the 2011 Population -Housing Census has not been published, yet the results have already been published in the Government Gazette.

Tabulated census data are available on the official website of ELSTAT, at “ Population Census 2011”.

Users are not allowed to have access to Census microdata.

Users can be given data or other statistical analysis, through mail, fax or e-mail, upon request, after submitting an application to the Statistical Information and Publications Division, ELSTAT, 46 Peireos & Eponiton str. 80847, 18510 Piraeus (tel. +302131352-310, Fax: +302131352-312, e-mail: data.dissem@statistics.gr and census@statistics.gr).

Users can also submit their requests via website at: “Statistical Data request”.

The methodology implemented for the 2011 Population and Housing Census was laid down in a relevant circular published by ELSTAT (Circular 1 “ General guidelines for the preparation, organisation and conduct of the General Censuses”) taking into consideration international practice and mainly the recommendations, guidelines and rules set out by Eurostat, in compliance with Regulation No 763/2008 of the European Parliament and the Council.

Quality documentation will be based on the National Methodology Report on the 2011 Population-Housing Census, which will be posted on the official website of ELSTAT.

All the necessary checks and corrections were carried out in order to eliminate counting errors. Quality checks and validation of data validation were conducted throughout the whole process of production of statistics, from the stage of data collection to the final compilation of the Census results.

First stage: The questionnaires, which were filled in by the external survey workers, were then collected by ELSTAT staff in the local offices of ELSTAT which had been established during the conduct period of the Census. The questionnaires were then checked in order to identify any errors. The questionnaires underwent logical and completeness checks. Afterwards, the questionnaires were sent to the premises of ELSTAT.

Second stage: the questionnaires were scanned through OCR software and new logical checks were carried out electronically. In addition, they were checked for completeness and in order to identify any double recordings. The individuals who were double recorded (double enumerated) were dully deleted from the database and in addition a minor loss of questionnaires was identified (the questionnaires of 6 out of 58,684 census sections were lost). The data of these questionnaires were imputed and then imported in the database. The imputation method was based on the questionnaires of similar census sections belonging in the same geographic area. Then, quality checks and crosschecks between the variables were carried out in the data of the database and any errors were dully corrected by using auto correction rules. The results of the 2011 Population-Housing Census were compared with the corresponding results of the 2001 Population-Housing Census, as well as with corresponding data of other surveys conducted by ELSTAT (e.g. Labour Force Survey, etc) in order to identify the tendency longitudinally and to evaluate the census results.

In addition, in order to assess the completeness and quality of the produced results, ELSTAT conducted a Post Enumeration Survey on a sample of 19,380 households from all over Greece. The results of the PES show that the resident population was under-estimated (coverage error) by 2.83% for Greece total, a percentage share which is in full compliance with the quality standards set out for Censuses.

The main users of the Population-Housing Census results are General Government entities, universities, research centers, local government and private users, as well as international organisations (Eurostat, the United Nations, etc).

The Census data are necessary for drawing the economic and social policy of the Country, but also in order for Greece to fulfill its obligations towards the European Union and other international organisations. In addition, the census data are the basis for the conduct of other surveys and research projects.

The Population and Housing Census is conducted pursuant to EU Regulation which was compiled taking into consideration users’ needs at European and international level.

At the same time, ELSTAT conducts a user satisfaction survey, every six months, the results of which are available on the porstal of ELSTAT, at the following link:

http://www.statistics.gr/portal/page/portal/ESYE/BUCKET/General/ELSTATUserSatisfactionSurvey12.pdf

The Population and Housing Census and the compiled results are  fully inline with  Regulation No 763/2008 of the European Parliament and of the Council.

The main sources of errors were:

1)Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2)Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3)Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

The main sources of errors were:

1) Refusal of individuals to be enumerated during the census, something that during the PES resulted in under-coverage errors.

2) Some individuals were not enumerated on account of the enumerators who were not performing their tasks efficiently. Some other individuals, belonging to “single” households, were not enumerated because during the conduct of the census they were abroad (these cases were also reflected as under-coverage errors).

3) Some questionnaires were not filled in properly either because the surveyed persons refused to answer all the questions, or on account of the enumerator (these errors were corrected and filled in with imputed values).

4)A small number of questionnaires were lost during their transportation.

No sampling errors, since the survey is a census survey.

The non-sampling errors of the 2011 Population-Housing Census are as follows:

1) Under-coverage (under-coverage errors amounting to 2.83%, which were calculated on the basis of a special sampling post enumeration survey)

2) Errors due to the erroneous filling in of questionnaires

As regards under coverage errors, no adjustments were made to the Census database on the basis of the error rate, while, as regards the errors on account of erroneous filling in of questionnaires, these errors were identified and dully corrected by applying the imputation method. More specifically, the variables of those individuals who had not responded were filled in with the corresponding values from other individuals with similar characteristics. The imputation rate for each variable did not exceed 10%. This process eliminated non-response bias.

3) Errors due to the loss of questionnaires, which were corrected by imputation. More specifically, the items which were corrected by this method amounted to: 0.009% of the dwellings, 0.007% of the households and 0.007% of the individuals.

The deadline for data submission was 31/3/2014.

There was an unofficial extension of the deadline by a few days.

The results are comparable with the corresponding results of other EU Member States since they are based on common definitions of variables in compliance with European Regulation.

763/2008, as well as on common procedures for the processing of data which are fully harmonized with international practices.

The methodology of the 2011 Census differs significantly in several respects from that of previous Censuses, both with regard to the modalities of conduct of the Census, for example the duration of the Census (15 days) and the enumeration of individuals at their place of usual residence, and with regard to the processing of Census data, based on new technologies and modern methods. Thus, the results of the 2011 Census and those of earlier Censuses are not fully comparable.

There is no cross-domain coherence between the Population-Housing Census data and the data from other surveys conducted by ELSTAT, e.g. the population-housing census data differ from the corresponding data of the Labour Force Survey because the latter is a sample survey and not a census survey and its data derive from the weightings based on the data of the 20101 Population-Housing Census.

The Census data are internaly coherent for similar variables, at all the geographical levels.

On the basis of calculations for estimating the cost and the burden for the collection and processing of the data of the 2011 Population-Housing Census, its is estimated that  all these procedures lasted 40 months and encompassed the work and participation of ELSTAT staff, external survey workers and civil servants from other agencies of the public sector.

The first data, which are releaed, are provisional data. They are validated and become final data when all the collected data are finalized. The data are validated by ELSTAT on the basis of strict checking rules. Furthermore the final, aggregate data are checked again. However, the final data may undergo some revisions at a later stage, if any errors are identified. More details on the revision policy of ELSTAT can be found on the portal of ELSTAT, at the following link: http://www.statistics.gr/portal/page/portal/ESYE/BUCKET/General/ELSTAT_Revisions_Policy_22_5_2013_EN.pdf

The data, which are published and released as final data, may be revised in case where it is deemed necessary. There is no time schedule for the revision of the Census data.

Traditional Census without using any data from administrative sources or registers form other surveys. The data are directly linked with the dwellings, collective living quarters and the individuals residing there.

Traditional Census without using any data from administrative sources or registers form other surveys. The data are directly linked with the dwellings, collective living quarters and the individuals residing there.

Traditional Census without using any data from administrative sources or registers form other surveys. The data are directly linked with the dwellings, collective living quarters and the individuals residing there.

Traditional Census without using any data from administrative sources or registers form other surveys. The data are directly linked with the dwellings, collective living quarters and the individuals residing there.

Traditional Census without using any data from administrative sources or registers form other surveys. The data are directly linked with the dwellings, collective living quarters and the individuals residing there.

Census data are collected every ten years in a calendar year closest to the begging of the decade preferably of '0' or '1'.

The data of the Population and Housing census were collected through personal interviews with the representative of the households, as well with every resident of the collective living quarters, on the basis of a specially designed questionnaire. The design of the census questionnaire was covering both national and Community requirements for statistical information. The questionnaire covered all the variables laid down in Regulation 763/2008 and in addition variables of national interest. The design of the questionnaire took also into consideration users’ and ELSTAT’s needs. In order to ensure effective collection of data, several training seminars were organised for the staff that participated in the Census.

 1) Training of Seniors Supervisors and of Census Supervisors: a two-day training seminar was organised in the premises of ELSTAT with the participation of seven (7) Senior Supervisors and of ninety-four (94) Census Supervisors. The Senior Supervisors were Directors of Statistical Divisions of ELSTAT and the Census Supervisors were mostly Head of Sections or employees with experience in the conduct of censuses. The trainers were skilled and qualified employees with exprencience in the conduct of Population-Housing Censuses. Among the issues studied during the seminar were the organisation and the conduct of the census and their competencies. The census questionnaire was also presented and analyzed and some special cases were discussed.

2) Training of Assistant Supervisors: they were trained by the competent Census Supervisors and they were working under their guidelines and directions. The Census Supervisors amounted to 543 persons who were either permanent personnel of ELSTAT or employees who were recruited on a temporary basis especially for the purposes of the Census.

3) Training of Chief of Census Sectors and Enumerators: the Chiefs of Census Sectors (approximately 12,000), the Enumerators (approximately 45,000) and the Assistants-Interpreters (approximately 304) were trained by the local competent Supervisors during one-day training seminars. During the seminars the census questionnaire was presented, their competencies and tasks were explained and other issues were discussed, such as issues concerning the filling in of the questionnaire and specific issues concerning the cases of refusals. The Chiefs of Census Sectors, the Enumerators and the Assistants-Interpreters were employees working in the private or public sector (except ELSTAT) who were selected on the basis of a specific selection procedure. The Senior Supervisors were supervising and monitoring all the census tasks in a geographic area, which included including a big number of Supervision Areas. In every Supervision Area the Supervisor was responsible for the census tasks and he was assisted by the Assistant Supervisors. Each Supervision Area was divided into Census Sectors. The competent person in every Sector - which was divided into four (4) enumeration sections- was the Chief of Census Sector whose main responsibility was to monitor the work of his enumerators. The enumerators had to visit every inhabited area of their enumeration section and to fill in the corresponding questionnaires. The enumerators were assisted by the assistant-interpreters.

The data were validated as follows:

1) Logical checks and completeness checks were conducted in every Supervision Area in order to ensure correctness of data and to dully correct any errors. Before the delivery of data to the Supervision Areas, the Chiefs of Census Sectors had already conducted the appropriate checks.

2) Optical Reading of Data (OCR) on the paper questionnaires and data verification process.

3) Verification of data: validation of data after a series of electronic checks. The errors, which were identified by these checks or reminders, were dully corrected.

4) Checks in order to identify any double- enumerated individuals.

5) Quality checks: the variables were correlated and logical checks were conducted in the database by using specific rules and in case of inconstancies the errors were auto-corrected. The results of the 2011 Population-Hosing Census were compared with the corresponding data of the 2001 Population-Housing Census, as well as with the results from other surveys conducted by ELSTAT (e.g., LFS) in order to asses the produced results.

After the collection of questionnaires and their optical reading the data were finally introduced and saved in an electronic file. Then, in the database the variables were correlated and several logical checks were conducted using specific rules and there were also auto-corrections in cases of inconsistencies. An imputation procedure was implemented in cases of variables with non-response. Finally, the final database with the Census microdata was compiled from where the tabulated results were produced.

No adjustments.