See Regulation 692/2011, Delegated Regulation 2019/1681 and Methodological Manual for Tourism Statistics

Participation in tourism: the individual.
Tourism trips: the tourism trip with at least one overnight stay made by the individual.
Same-day visits: the SDV made by the individual.

Participation in tourism: All residents aged 15 or over.

Tourism trips: All tourism trips of at least one overnight stay made outside the usual environment by the residents aged 15 or over

Same-day visits: All outbound and domestic SDV made outside the usual environment by the residents aged 15 or over.

2009

2009

2009

2009

Regulation 692/2011

Regulation 1051/2011

Delegated Regulation 2019/1681

The quality of statistical information is assured by monitoring the accuracy and timeliness.

Coverage errors, non-response rates, imputation rates.

The experience gained over the years leads to higher quality information collection

See: Regulation 692/2011

Main users:

Bank of Portugal

Tourism of Portugal Institute

Eurostat

Tourism operators and investigators

Other INEpt units (national accounts i.e.)

Compliant with the requirements of Regulation on tourism statistics 692/2011, Delegated Regulation 2019/1681, as well as recommendations laid down in the Methodological Manual for tourism statistics.

180

120

180

0

0

0

See 3.8.1

From 1999 to 2006 there are comparable datasets for all variables. In 2007 started the implementation of a new methodology, process which finished in 2009 (transition from CAPI to CATI, introduction of new variables, changes on the dwellings rotation scheme, among others), so the 2007 and 2008 data are only partially comparable with the prior periods. From the reference year 2009, all variables are fully comparable over time.

See 3.8.2

From 1999 to 2006 there are comparable datasets for all variables. In 2007 started the implementation of a new methodology, process which finished in 2009 (transition from CAPI to CATI, introduction of new variables, changes on the dwellings rotation scheme, among others), so the 2007 and 2008 data are only partially comparable with the prior periods. From the reference year 2009, all variables are fully comparable over time.

See 3.8.3

From 1999 to 2006 there are comparable datasets for all variables. In 2007 started the implementation of a new methodology, process which finished in 2009 (transition from CAPI to CATI, introduction of new variables, changes on the dwellings rotation scheme, among others), so the 2007 and 2008 data are only partially comparable with the prior periods. From the reference year 2009, all variables are fully comparable over time.

Household survey

Inquérito às Deslocações dos Residentes

Travel Survey of Residents

The sampling frame was selected from the National Dwellings Register (NDR) which in turn uses information collected in the 2011 Census. It is also constituted by private dwellings of usual residence with telephone number and excludes collective households and institutions. 

The update is based mainly on information from fieldwork (from other surveys).

New dwellings (under one year) are not covered

12 313 dwellings

12 313 dwellings

12 313 dwellings

6 954 dwellings

6 954 dwellings

6 954 dwellings

Total sample for same-day visits = 6 954 dwellings

The sample has been designed considering several factors:

• The ability to conduct interviews by CATI;

• Obtaining around 5000 complete interviews, considering the dwelling as a residence of a household, with telephone and whose at least one member is enabled to answer a telephone interview (excluded individuals aged less than 15 years, reasons of lack of knowledge of Portuguese language and physical disabilities, for example);

• The response rate in previous years;

• The cost of the statistical operation.

Given these factors, the size obtained was 13 284 dwellings, which were distributed by NUTS II (2013) regions according to the modified Neyman allocation.

The sample is rotating, proceeding to a replacement of half of the units surveyed at the beginning of each year, which means that each year we proceed to refresh half of the sample (6 642 dwellings). Thus, for the units that remain in the sample for two years, each dwelling will be surveyed 8 times, once per quarter to collect information on the occurrence and quantification of tourism trips by household, as well as their characteristics in each quarter.

Individual dwellings in the sample are surveyed on a quarterly basis. Each dwelling is previously identified with a code (1, 2 or 3) for the corresponding month of the quarter in which it will be surveyed. This means that the sample will be distributed for each month of the quarter, and the reference period of the data will always be three months prior to the month in which the interview takes place (e.g.: an interview that takes place in April, the reference period will include visits began in January, February and March and so on).

Inquérito às Deslocações dos Residentes (see annexes)

Not available

Not available

Proxy interviews are mandatory for children under 15. For other persons Proxy-Interviews are allowed under conditions: Person is too old, too sick, abroad for a long time period, does not speak the language and the Proxy person knows well the trips undertaken of the other person.

CATI - 15-20 min

20 minutes

As data collection is performed with the aid of an information system, all entered data are online checked: registration, coding and some validations (pathway and coherence) are made at the time of interview (CATI). The type of errors displayed can be “fatal” implying the nullity of the interview, if not properly corrected during the interview or “warning” implying a further treatment (imputation or estimation). In both situations the interviewer can use the remarks facility. All those remarks are checked centrally in Statistical Office.

Each Regional Centre makes the verification of work and compiling of information collected in the region. This is then sent to the Department of Information Gathering, and then aggregated into a single national database.

On this data runs a set of validations of consistency, necessary for error checking and correcting, coding registration or missing information checking.

Treatment of non-responses:

The “margins adjustment" method was used for calibration, applying a correction factor for non-responses.

Achievement of results:

The calculation of the estimates is based on the application, to each statistical unit of the sample, of a weight that is the product of three factors:

• initial weight, based on the sample design;

• correction factor for non-response to compensate the effect caused by these in sample size;

• factor that calibrates (or adjusts) the sample to known population, using information external to the survey, through "margins adjustment" method. The margins used (auxiliary variables) result from independent estimates of the population nationally, according to gender and five age groups (0-14, 15-24, 25-44, 45-64, + 65) and also the total regional level NUTS II.

The initial weight of each sample unit is given by the inverse of their probability of selection.

The method of the "margins adjustment” is to select a function that minimizes the distance between the initial weights and the final weights adjusted, subject to the conditions of adjustment. These conditions ensure that the auxiliary variables, extrapolated with weight adjustment, are equal to known population totals.