Bulgarian Longitudinal Inclusive Society Survey 2013
The Bulgarian Longitudinal Inclusive Society Survey (BLISS) was conducted in March and May 2013 by Open Society Institute-Sofia and the World Bank. This survey is a continuation of the panel Crisis Monitoring Survey (CMS), with an additional module on the cognitive and socio-emotional skills of the adult population in Bulgaria.
The main purpose of BLISS is to analyze the major barriers to activation (such as skills gaps and mismatches, informational asymmetries, and/or disincentives inherent in the tax-benefit schemes) for different groups (such as women, older workers, and Roma) through an understanding of the labor markets' behavior. The BLISS was conducted using the same panel of households as the CMS for the main sample and the "booster" (Roma) sample. BLISS is treated as an additional round of CMS in the longitudinal analysis, as well as a cross-sectional survey.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
v01, edited, anonymous datasets
Variable values labels for "other" response options cannot be read due to a decoding problem. English translation of these labels is not available.
Unit of Analysis
Producers and sponsors
Authoring entity/Primary investigators
Open Society Institute-Sofia
Open Society Institute-Sofia
The BLISS was conducted using the same panel of households as Crisis Monitoring Survey.
Two samples were used in Crisis Monitoring Survey: main sample and booster sample.
The main sample was created in two stages.
First, the population was stratified by district (NUTS 3) and type of settlement. In Bulgaria, there are 28 administrative districts. For the type of settlement three categories were defined - rural, urban (with population under 50,000) and metropolitan (with population over 50,000). Bulgaria's capital, Sofia, is include in the metropolitan category. In this way 28 x 3=84 categories (strata) were defined and proportional allocation was made. The method of selecting settlements from each stratum is simple random sampling with replacement, weighted by the number of households in the settlement.
In the second stage, voting stations were chosen in each settlement. Voting stations were used as a type of cluster. Voting stations were selected with probability proportional to the number of voters in each station. In each cluster, (voting station), 20 household addresses were randomly selected from the list of all addresses in the station. The first 10 addresses, which had to be visited mandatorily, formed the main list. If there was a refusal in a household of the main list, this household had to be replaced with an address from the list of reserves (the last 10 addresses).
For the Roma booster sample, an expert database was used. It contained basic information for all segregated neighborhoods in the country like locality (district, municipality and settlement), an experts' approximation for the number of population, number of households, number of houses and other characteristics. The planned booster size sample was 300 households. Simple random sampling without replacement was used in segregated neighborhoods, weighted by their population. In this way, 30 segregated neighborhoods in 20 districts were selected. In each district, 10 randomly sampled households had to be interviewed. GPS sampling was used to identify households in each cluster.
In BLISS, there were five types of addresses:
- All the households from the first wave, regardless if they were interviewed in the second and third waves or not;
- Addresses of the households only from the second and third waves;
- Addresses of the households only from the third wave;
- Addresses of the households only from the second wave;
- Additional addresses to complete the list to 2,400 households.
In BLISS, 2,239 main sample households and 285 booster sample households were interviewed.
The planned size of the main sample in the first round was 2,384 households, 99% of this sample was realized. The planned size of the Roma booster sample was 296 households, 99% of this sample was realized.
For each cluster, there was a list of 10 addresses that had to be visited by the interviewer and an additional 10 addresses in reserve. If any of the first 10 addresses did not exist, dwellings were locked for a long time or the people refused to be interviewed, the additional ones were used. According to instructions, the interviewer had to visit each address in the main list three times, unless the building (or appartment) was obviously uninhabited. The interviewer had to write down what happened at each visit to each address on the list. At addresses where the interview did not take place, the interviewer noted the reason. Once an interview was done, the questionnaire got an ID that showed whether the address was on the original list or not.
Detailed information about weighting procedures is available in the document "Sample Design and Weighting Procedures for Bulgaria Crisis Monitoring Survey (CMS) and the Bulgarian Longitudinal Inclusive Society Survey (BLISS)" in Related Materials.
Dates of Data Collection (YYYY/MM/DD)
Mode of data collection
Type of Research Instrument
The questionnaire used in BLISS is similar to Crisis Monitoring Survey questionnaire, but it has an additional module on cognitive and socio-emotional skills of the adult (18-65) population.
Use of the dataset must be acknowledged using a citation which would include:
- the Identification of the Primary Investigator
- the title of the survey (including country, acronym and year of implementation)
- the survey reference number
- the source and date of download
Open Society Institute-Sofia, World Bank. Bulgarian Longitudinal Inclusive Society Survey (BLISS) 2013. Ref. BGR_2013_BLISS_v01_M. Dataset downloaded from [URL] on [date].
Disclaimer and copyrights
The user of the data acknowledges that the original collector of the data, the authorized distributor of the data, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.