Croatian Bureau of Statistics (CBS)

Labour Market Statistics Department

Branimirova 19 – 21, 10 000 Zagreb

With the Structure of Earnings Survey we wish to provide insight into the structure of earnings, i.e. to present different wage categories (earnings, bonuses, holiday bonus, paid hours, paid overtime, days of holiday leave, etc.) by different characteristic of business entities or their units (size class, activity etc.) and by characteristic of employees (sex, education, occupation, etc.).

Structure of Earnings Survey (SES) was introduced in statistical system of the Republic of Croatia for the first time in 2011 as a component in “IPA 2008 – Technical assistance in development of selected areas of statistics” (programme financed by European Union).

National Classification of Activities, 2007 version, comparable to the international Statistical Classification of Economic Activities in the European Community NACE Rev. 2

National Classification of Occupations, NKZ 10., comparable to the International Standard Classification of Occupations ISCO-08, was used in the coding of occupations

International Standard Classification of education ISCED 2011

 Target population are all enterprises located in Croatia which employ at least 10 employees and were active in October 2018. NACE Rev.2 activity sections B-S were covered.

Key variables:

Average annual / monthly / hourly earnings per person in paid employment by different wage categories, by different characteristics of business entities and by characteristics of employees;

Statistical unit is enterprise.

The Structure of Earnings Survey covers all persons in paid employment having employment contract with the enterprises selected in the SES sample. The survey did not cover persons working based on work agreements or author's contracts, contracts with juveniles’ and students’ employment services, pupils and students in training.

The Republic of Croatia.

2018 and October 2018 as a reference month.

No base period.

Sampling frame

Target population are all enterprises located on the teritory of the Republic of Croatia employing at least 10 employees and active in October 2018 NACE Rev.2 activity sections B-S were covered. The sampling frame was selected from the Statistical Business Register (SBR); the most appropriate source for sampling frame available in the CBS.

Sampling frame for SES 2018 consists of 17 101 enterprises that fulfil above mentioned criteria.

Sample

Two stage stratified sampling was used in the process of selecting sample.

At first stage enterprises based on the following 3 criteria: NACE Rev. 2 activity section, size of an enterprise and NUTS2 region were selected from the sampling frame. This has been done by CBS’s Sampling Department. Stratification of the targeted population according to 3 stratification criteria is presented in the attached document (SES2018_stratification of sample.xlsx).The final size oa a sample is 4 500 enterprises.

Second stage of sample selection was done on the field, by respond units selected in the sample – enterprises were asked to select employees for which they were then asked to deliver requested data. Clear explanations on how to select employees were provided in the questionnaire. The procedure was explained through 4 steps.

Data on SES are collected every four years, in accordance to Commission Regulation (EC) No 1738/2005.

Data collection for SES 2018 was entirely conducted under jurisdiction of CBS’s Labour Market Statistics Department. For the purposes of data collection e-questionnaire was created. Also, respondents could choose to deliver data in paper form (paper questionnaire was also available).

All the data collected were validated throught set of logic controls.

Not requested.

Data are not adjusted. All relevant national legislation is in line to regulation requirements.

Key quality indicators are calculated regularly.

Standard quality report accompanies every SES survey in accordance to Commission Regulation (EC) No 698/2006.

Major national users of SES data are different government bodies especially Office of the Gender Equality Ombudsperson.

Major foreign user of data on SES is Eurostat.

Anonymised microdata are also available on CD-ROM for researchers, prepared by Eurostat.

Not assessed.

All mandatory variables are compliled and transmitted to Eurostat.

100%

More in detail described under 6.2 - 6.6.

Coefficients of variations are calculated for variables 4.2 Gross earnings in the reference month and variable 4.3 Average gross hourly earningsin the reference month.

Please see the attached document Coefficients of variation.

More in detail described under 6.3.1 - 6.3.4.

No cases of over-coverage, nor under-coverage were detected.

No cases of over-coverage

Not applicable.

Each question in the questionnaire has a clear explanation of what should be included an also what should be excluded from data presented. All the data entered in application prepared for data entry are tested with logic control. Logic control contains a set of treshold values which the values of variables should not exceed.

See 6.3.3.1 and 6.3.3.2

The total unit response rate was 56,33%.

No cases of item non-response. In case mandatory data were missing, enterpise was contacted to check and corrected if necessary.

See 6.3.4.1.

No imputation was performed, nor statistical editing.

Models are not used for this data collection.

Not applicable.

Once data production process is finalised data are not beeing revised. They are considered as final.

Once data production process is finalised data are not beeing revised. They are considered as final.

No differences between provisional and final data.

See 7.1.1 and 7.1.2.

Data become available in December 2020.

Data become available in December 2020.

Response units selected to participate in SES data collection were notified about participation by a mailed circular letter. This letter contained general information about survey guidelines on data delivery and contact information in case of any technical or methodological questions

Methodological guidelines were attached to circular letter with detailed instructions on web questionnaire, sampling instructions and definitions of variables.

Initially, it was possible to fill in data using on-line questionnaire from May 1st until the May 30th 2019, but due to technical problems this deadline was extended for two weeks.

Due to the fact that response rate at this stage was relatively low, reminders were sent via e-mail from July to September 2019 to those respond units that didn’t respond.

During data collection all data from incoming questionnaires were entered in prepared application and also simultaneously logically tested. In case there were some errors in data, respondents were contacted via telephone or e-mail and asked to deliver corrections or to verify that delivered data are correct.

Data processing was interrupted due to earthquake and lockdown as consequences of the COVID pandemic.

First data were transmitted to Eurostat on 13^th November 2020. After acknowledged from Eurostat data had to be validated two times.

Finally, clear database was retransmitted to Eurostat on 27th November 2020.

Not applicable.

SES 2018 was in Croatia prepared and conducted fully in line with EU regulations.

Not applicable.

In comparision with SES 2014 all methods remained the same.

SES is carried for the third time; 3 waves are available: SES 2010, SES 2014 and 2018. See attached comparison over time.

The only possible data source to which data from SES could be compared is regular Monthly survey on persons employed and wages (RAD-1). See attached cross domain comparison.

For this purposes data on monthly gross earnings per employee for October 2018 from both surveys was compared.

The differences in data come out from coverage. Data from SES 2018 are sample based survey and those from RAD-1 relate to all legal entities with 1+ employees (full coverage).

Not applicable.

Not available.

Not applicable.

No national News Release.

No national publications.

No on-line publications.

No data tables published.

Anonymised microdata are available on CD-ROM for researchers, prepared by Eurostat.

Not applicable.

No methodolgical document published; only internal production and methodological documentation is available.

Not applicable.

[Not requested]

[Not requested]

Not assessed.

Individual data are protected by the Official Statistics Act.

[Not requested]

No comments.