The 2001 Bulgaria Integrated Household Survey was conducted by BBSS Gallup International under the supervision of the World Bank. Because of the expected excessive level of attrition due to the large time lag from the last survey and the massive internal and external migration since 1997, for the purpose of this survey it was decided to draw a new cross-section of households. Using the same stratified two-stage cluster design adopted in 1995, a similar nationally-representative sample was drawn by the National Statistical Institute (NSI) from the pre-census listing of the 2001 Population Census.
The main objective of the survey was to provide comparable poverty figures with the previous studies, the questionnaire used is virtually identical to the one used in the previous surveys and when changes were introduced particular attention was paid to maintain consistency with the previous questionnaires.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
Unit of Analysis
Producers and sponsors
Authoring entity/Primary investigators
The World Bank
Sample size is 2,875 households
As in 1995, the original sampling plan called for the selection of five households in each of 500 randomly selected census clusters. In 2001, six households per cluster were provided by NSI to Gallup and the sixth household was used to replace households in the original sample in cases of refusal or absence. Each field substitution had to be verified by the team leader and approved by the field supervisor. A total of 2,500 households were finally interviewed. In addition, 133 Roma households were oversampled to allow more significant statistical comparisons of the group in some of the analyses. Detailed rules for the selection of the oversample were given to the enumerators and each selection was verified by the team leader.
Dates of Data Collection (YYYY/MM/DD)
Mode of data collection
Type of Research Instrument
Being a multi-purpose survey, the BIHS01 questionnaire follows the structure of a typical Living Standard Measurement Survey (LSMS). The survey collected exhaustive information for the estimation of a consumption aggregate. This includes food and non-food consumption expenditures as well as data for the imputation of housing rental value and the user value of durable goods. The questionnaire also contains comprehensive information for the estimation of income by source, as well as quite extensive information on health, education and the labor market.
The questionnaire has the following sections:
Section 1: Household Roster
Section 2: Migration
Section 3: Education
Section 4: Housing
Section 5.1: Food Expenditure and Consumption
Section 5.2: Purchase of Non-Food Commodities
Section 6.1: Employment - status and history of employment
Section 6.2: Main job - dependent activity (working for a salary or commission for somebody else)
Section 6.3: Second - dependent activity (working for a salary or commission for somebody else)
Section 6.4: Self employment - independent activity (working for yourself)
Section 6.5: Agricultural land
Section 6.6: Agriculture - crop production, yield
Section 6.7: Agriculture assets
Section 6.8: Agriculture - livestock: cattle, pigs, etc.
Section 6.9: Other Farming Income and Costs
Section 7.1: Remittances - Income Received from Absent Members of the Household or from Any Other Person.
Section 7.2: Remittances - Absent Household Members and Other Persons Who Received Contributions from the Household
Section 8.1: State old age pension
Section 8.2: Private old age pension
Section 8.3: Survivor's pension
Section 8.4: Disability pension
Section 8.5: Unemployment benefits - for all people above age 15
Section 8.6: Maternity and childcare benefits under the social assistance system
Section 8.7: In kind individual social benefits
Section 8.8: Summary of child benefit allowance
Section 8.9: Cash and in kind household social benefits
Section 8.10: Other forms of revenue/debts
Section 9.1: Household furniture and durable goods
Section 9.2: Real estate assets
Section 10: Health Status
Section 11. Ethnicity of main respondent
To use the data from the Bulgaria 2001 Integrated Household Survey, we ask that you fill in a Data User Agreement. This agreement allows us to inform the statistical institute about the people who are using their data and the types of studies being done by users.
By filling out this form, you not only comply with the agreements reached by all parties in implementing the survey, but also help DECRG substantiate demand for this service. (Evidence of significant demand will strengthen the chances that more LSMS data sets get posted.) In addition to helping DECRG, by filling out this form we can keep you informed about any additional information related to the Bulgaria 2001 Integrated Household Survey and any information related to the posting of LSMS data on the Net.
The form states that downloading the data obligates you to cite the source of the data and to send copies of papers to the LSMS Division of the World Bank. The form also requires you to state your name, address, and intended use of the data. Once you have submitted the form, you will be sent to a page containing links to the data files. If your browser doesn't support forms (or fails to forward you to the data page upon completing the form), contact LSMS and you will receive instructions on how to progress to the page with the data files.
The use of the datasets must be acknowledged using a citation which would include:
- the identification of the Primary Investigator (including country name)
- the full title of the survey and its acronym (when available), and the year(s) of implementation
- the survey reference number
- the source and date of download (for datasets disseminated online)
Gallup International. Bulgaria Integrated Household Survey (IHS) 2001. Ref. BGR_2001_IHS_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.
Development Data Group
The World Bank
Generation of DDI documentation
Date of Production
Version 02 (July 2015)
- Data files description added;
- Disclaimer and Citation Requirement added