Statistical Office of Montenegro - MONSTAT

Department for Short-term indicators

IV Proleterske No. 2, 81000 Podgorica, Montenegro 

The aim of the survey of construction activity is to provide a results of construction activities by the type of construction. For this purposes is collected the data of the value of construction works, the value of new contract (order), number of employees on the construction site and effective working hours. The collected data enable a monitoring of construction production, overview of the size and structure of the investments in the buildings and engaged the labor force in the construction sector. Data for the variable 110 (index of production in construction) are available from this survey.

NACE Rev.2

Classification of Types of Construction - CC.

Reporting units of survey on construction activities are:

 - enterprises with 5 and more employees which are registered in sector F – construction (area 41, 42, 43) according to the classification NACE Rev.2 and

- enterprises (KAU) which are not registered in sector F, but whose local units perform the construction works.

Value of construction works - the value of construction works on buildings and civil engineerings which is reporting units perfomed during the reference period with workers who are directly engaged for execution of work. The VAT is excluded as well as the cost for purchase of land, design and supervision. 

New contract (orders) - total value of the contracted works in reference period which connected contractors and third party on conducting the construction work, including sub-contractors.  

Number of employees - total number of employees which are works in reporting unit (including the owner work, regular partners in the unit and unpaid family workers), as well as the emloyees that are work outside of their unit and who are paid by reporting units. Shall include employees who are absent for a short period (sick leave, paid leave or special leave), as well as employees in the strike and who are absent for an indefinite period. It is also includes the employees with part-time work, seasonal workers, trainees and family workers who are on the payroll. 

Effective working hours - total number of hours worked in the production of reporting units during the reference period.  

Quarterly survey of construction activities include reporting units that are in the Register of Business Entities registered in construction sector as well as KAU. 

In a sample of 2022, of 464 enterprises from the field of construction is included 131 enterprises, of which 127 enterprises with primary activity in the construction field and 4 enterprises with a secondary activity in the construction.

The whole territory of Montenegro.

Quarterly survey of construction activity is implemented since 1952. During the last years there have been changes and amendments, but the main variables such as the value of construction works, number of employees and effective working hours were constantly provided. The last revisions were made in 2010 by introducing the questions about turnover, the value of spent building materials and spent fuel and electricity. In 2011 is introduced the question for number of employees and effective working hours on the construction site (divided on building and civil engineering's).

The base year is 2015.

Indices, percentage changes (%).

Quarter.

The legal basis for the implementation of this survey is the Law on Official Statistics and Official Statistical System of Montenegro ("Official Gazette of Montenegro“, No. 18/12 and 47/19) and Annual plan of statistical surveys.

Implementation of the construction activity survey in Montenegro also relies on the Regulation for the Integration of Business Statistics REGULATION (EU) 2019/2152 - EBS.

Data are regularly transmitted to Eurostat via eDAMIS.

National legislation:                                           

According to the Law on Statistics and Statistical System of Montenegro, Article 54 the data collected, processed and stored for the purpose of official statistics shall be confidential, if it is on the basis of these data, either directly or indirectly identify reporting units which disclosing individual information.    

European legislation:

Regulation (EC) No 223/2009 of the European Parliament and of the Council, of 11 March 2009, on the transmission of data subject to statistical confidentiality to the Statistical Office of the European Communities.

Government of Montenegro, on the 64th session, held on February 22, 2018, adopted  Commitment on Confidence in Official Statistics which is available on web site http://monstat.org/eng/page.php?id=1461&pageid=1461

Confidential data are treated according to policy rules (see point 7.1). 
Data are nationally published only on the level at which they are not confidential.
Individual data represent an official secret.

Data are published 45 days after the reference period. Date of publication statements is defined in the Calendar of statistics of MONSTAT.

A statistical calendar is published on the website. A link to the MONSTAT website: 

http://monstat.org/uploads/files/O%20NAMA/Kalendar2022_eng.pdf

User access is achieved for construction statistics via the MONSTAT website. The data are available for all users at the same time. The data are published in a press release (Excel and Word), in the monthly statistical bulletin (Excel and Word) and as dynamic data (Excel).

Quarterly.

Data are available on the website: http://monstat.org/eng/page.php?id=319&pageid=35

Data are published in the quarterly release "Construction activity" and in Monthly Statistical Bulletin.

Data are available on-line at http://monstat.org/eng/page.php?id=319&pageid=319

Micro-data are not accessible.

Data are transmitted to Eurostat via EDAMIS.

A statement of methodology is available on website: http://monstat.org/uploads/files/gradjevinarstvo/Gra%C4%91evinska%20aktivnost/Methodology_Construction%20activity_2021.pdf 

Quality report of this survey is available on the web site: http://monstat.org/eng/page.php?id=1640&pageid=319 

MONSTAT has officially accepted the European Statistics Code of Practice. European Statistics Code of Practice in Montenegro is available on the website: http://www.monstat.org/eng/page.php?id=5&pageid=5

For the systematic and standardized approach to quality, the Quality Management Framework was adopted by MONSTAT. Clear intention is expressed to take further steps towards full compliance with the European Statistics Code of Practice.

Quality is monitored throughout all stages of data production, by the responsible statisticians, according to specifications for concrete surveys. Data collection, data capture and processing are usually subject to this monitoring (similarly as timeliness and punctuality).

In the framework of the organization of statistical surveys, selected quality aspects are part of preparing staff involved in statistical production.

The Quality Management Strategy is available on web site http://monstat.org/eng/page.php?id=1422&pageid=1422

Users of data are: Eurostat, Ministry of Finance and other Ministry, sectors inside MONSTAT, the companies engaged in construction, other general public.

Customer satisfaction survey is not yet available at the level of research. All users request was fulfilled and based on that, we have concluded that users are satisfied with our survey. At the level of institutions is available online survey:

https://www.monstat.org/uploads/files/kvalitet/2.%20Izvjestaj%20o%20zadovoljstvu%20korisnika%20-%202022_FINAL%20engleska.pdf

The survey is done on the sample and includes the enterprises that are registered in sector F (according to the Classification NACE Rev.2) and the data from this survey are harmonized with the REGULATION (EU) 2019/2152 EBS.

The results of quarterly survey of construction activity are based on a sample of reporting units and are subject to the usual types of errors associated with sampling techniques, as well as non-sampling errors, measurement errors, processing errors and non-response. Sampling error for value of construction works was calculated using SAS procedure Proc survey mean for part which was sample based.

Quarterly survey of construction activity is done on a sample basis. Included are all enterprises and KAU with 5 and more employees who are registered in sector F according to the classification NACE Rev.2. The reporting units from class 1 (5-49 employees) are selected through stratified random sampling method. Reporting units from the class 2 and 3: >50 employees is full coverage. In the class 1 are 96 reporting units, in the class 2 are 33 and in the class 3 are 2 reporting unit. Sampling error of estimated value of construction activity calculated as CV is below 10% by quarter and it is precise enough to be published.

a) Coverage error is the divergence between the frame population and the target population. We didn't make the estimation of the impact of entrepreneurs.

b) Measurement errors are errors that are occurring during the data collection and caused that the recorded values of variables be different from the true ones.

c) Processing errors. When the data have been collected, they pass through a range of processes before the final compilation (estimates, etc.) are produced: coding, keying, editing, imputing, weighting, tabulating, etc. Errors introduced at these stages are called processing errors.

d) Non-response errors occur when the survey fails to get response to one, or possibly to all questions of the survey. Typical response rate is around 75%.

The unit non response rate is calculated as the ratio of the number of units which did not responded to the total number of eligible units (unweighted rate). The item non response rate is calculated as the ratio of the eligible units which have not responded to a particular item and the in-scope units that are required to respond to that particular item.

We perform the imputation on the level of field and on the level of questionnaire. Imputation on the level of field is conducted by the missing variable we take an average of that variable from previous quarter. The non-response on the level of questionnaire solved by imputing the data based on the previous quarter (the average value).

The data are published 45 days after the end of the reference period.

Deadlines for publishing have been complied in accordance with the calendar of release.

Not applicable. 

During the last years the ammendments have been done, but the main indicators such as the value of construction works, effective hours worked and number of employees were constantly collected. The data are comparable since 2010.

In some cases, data from other areas of economic statistics can be used for cross-checking of data. If the differences between results from survey and other sources are significant, we made double checking of data.

The data are internal coherent. Higher level of aggregations are derived from the detailed indices according to a well-defined procedures.

Financial resources required for the implementation of this survey are defined by the budget of Statistical Office of Montenegro. 

Revision Policy prepared by Statistical Office of Montenegro is available on web site: http://monstat.org/userfiles/file/o%20nama/2017/Revision%20policy.pdf 

The revision policy is applied nationally and in transmissions to Eurostat.

Significant revisions have only been made to reflect changes in methodology. We update figures all the time in the new press release with the remarks. The biggest revision is happen when we change base year. 

A statistical calendar is published on the website. A link to the MONSTAT website:

http://monstat.org/uploads/files/O%20NAMA/Kalendar2022_eng.pdf 

Routine revisions, related to replacing estimated data with the subsequently reported data, are not carried out, because all data are available according to the deadlines.

If error occurs, corrected data are published in the next issue of First release. Data changed in relation to the first released are disseminated with a comment.

The requiered indicators MR and MAR has not been calculated yet. 

Size of revisions has not been calculated yet. 

Use of benchmarking and domain (indicator) specific characteristics of revisions are not available.

Data are collected on a sample of reporting units including Statistical Business Register (SBR) in MONSTAT which are registered according to sector F by Nace Rev. 2 classification. In the class 1 (5-49 employees) is 96 reporting units, in the class 2 (50-249 employees) is 33 and in the class 3 (>250 employees) is 2 reporting units.

Quarterly.

Data are collected through questionnaires (by post, email or fax).

In order to improve the quality of data we check that the coverage and response are as required; checking the illogicalities (large increase or decrease in value of construction works, a large change in the new contracts compared to the previous quarter) and ect. We contact the reporting units if it’s necessary.

The data are collected on a sample of reporting units which results represent a quarterly estimation of construction activities in Montenegro. Horvitz-Thompson estimation of totals are calculated according to the standard procedure for stratified sample with random selection of units within a stratum. The estimation of totals are calculated by summing the weighted values from the sample, where the weight for units from the same stratum is equal to the quotient of the number of units in the stratum and of the number of units in the sample. The original weights are adjusted for non-response. Allocation is done with Neyman algorithm. 

The data is working day and seasonally adjusted.

More information about the seasonal adjustment please sees in Annex.

Not applicable.