Czech Republic

Title: Microcensus 1996

GENERAL INFORMATION AND BASIC DEFINITIONS

1. Background

Further information is available from Czech Statistical Office of SokolovskÓ 142 186 04 Praha 8, e-mail: kalmus@gw.czso.cz.
Data have been collected by household survey since 1956.

2. Purpose and coverage

The following purposes are considered to be very important or of some importance:
Lesser importance is attached to:

Geographic coverage: National without any specific geographic areas excluded.

Population coverage:
The following types of household are included in the data collection:
The following types of household are excluded in the data collection:

Units:
Dwelling units are used in the sample selection and are characterised by:
Data are recorded for the household unit which is characterised by:
Data are recorded for the family unit which is characterised by:

Unit members: Usual residents are always included as unit members. Visitors (not usual residents) temporarily living in the dwelling are not included as unit members. Domestic staff living in same dwelling/compound are included in the unit. Renters living in same dwelling/compound are included in the unit. Boarders living in same dwelling/compound are included in the unit.

3. Reference periods

The time period to which income and/or expenditure statistics refer when released/published is from 01/96 to 12/96. These data are collected in the period from 03/97 to 03/97. This survey is conducted 5-yearly. The statistics are published 5-yearly.

SURVEY METHODOLOGY

4. Sample design

The Primary, Secondary and Ultimate Sampling Units are enumeration area/district, none and dwelling respectively.

Stratification:
Areas/districts were stratified using the following criteria:

The sampling frames for the Primary Sampling Unit (PSU) and Ultimate Sampling Unit (USU) were the list of Census enumeration areas and list of dwellings respectively. The sample size was 38000 households or other units and 35.824 interviews. The overall response rate for the survey was 76.2 percent.

Enumeration procedure: Enumeration uses a single round survey design in which each reporting unit is enumerated only once. The sample is not divided into representative sub-samples. No action is taken to select a smaller set of reporting units for more detailed questioning.

DATA COLLECTION, CONCEPTS, DEFINITIONS AND CLASSIFICATIONS

5. Income data

Income data are collected. Receipts do not have to be regular and recurring to be considered as income. Income includes receipts resulting from the sale or reduction of assets and/or from incurring liabilities are included in income. Income excludes receipts that are not currently available to the unit.

The following receipts are collected separately:2
The following receipts are collected but not separately:2
The following receipts are not collected:2
The following receipts are classified as income from paid employment:
The following receipts are classified as income from self-employment:
The following receipts are classified as employment-related transfer income:
The following receipts are classified as transfer income but not employment-related:
The following receipts are classified as other income but not employment-related:
The following receipts are excluded for other reasons:
The following receipts are collected using the last 12 months as the reference period:

Income data were collected separately for each person receiving income. Components of income for an individual were collected directly from the individual. Negative values (business losses) were excluded when computing self-employment income.

6. Expenditure data

Expenditure data are not collected from this source.

7. Other Data Collection Issues

The following other topics are covered:

Households are not requested to indicate whether durable goods are new or second-hand when their acquisition is recorded.

Non-response: There is no substitution for non-response, whether by non-contact or by refusal.

Reporting errors are reduced using quality control.

DATA PROCESSING, ANALYSIS AND DISSEMINATION

Answers are pre-coded on data collection forms to the extent possible.

The responses are edited by the following:

Extreme values are retained without change. 4 In-kind receipts are included in the estimates, but consumption of own production is not. In-kind receipts are valued using: the imputed in office processing using market prices.

Treatment of owner-occupied housing: Values of owner-occupied housing are not included in the total income/expenditure estimates.

Treatment of selected groups/values in analysis: Some households/units are excluded from analysis because of incomplete response. Missing values are imputed only on some occasions when it is clear from other data what the value should be. Supplementary sources are used to adjust estimates for under- or over-reporting.5 No groups are excluded from data analysis.

Weighting:
Weighting factors are used to adjust for:

Sampling errors: Sampling errors are computed for major aggregates and these sampling errors are available on request.

Tabulation and Analysis: Statistics are presented showing averages per year and statistics are analysed and tabulated for households only.

The following classifications are used for tabulation and analysis of income statistics:

Documentation and Dissemination:
Published survey reports: mikrocensus 1996, 05/98
Published methodological information: pokyny pro tazatele k provedeni setreni ve vybranych domÓcnostech. Mikrocensus 1996, 01/97

Additional statistics (or special tables on request) are available for public use, with charges (via the CZSO's PR Dept.). Separate tables are not published for any special population groups.


(1) Household head is always male in what are called complete families (two partners with or without children). In one-parent families it is mostly the parent. Only in the cases where he/she is inactive, an active childs is the head instead. The head of a non-familiy household is the person with the highest income. (2) Classification of income is based on slightly different criteria. Employee's income, income of the self-employed, social income (transfers), and other income are separately distinguished. The concept of employment-related income is not used. Trans fer income and other income are not distinguished at all in the survey. The classification has been determined intuitively in the responses shown here. The survey does not gather information on employer's social security contributions because they are dete rmined by law and are thus easily imputable. (3) Interest received is classified as "income from self-employment", or as "other income". (4) Or in some cases amended. (5) Wages statistics,statistis on social security published by Ministery of Social Affairs.