Monthly Omnibus specification (residents of Latvia)
Research Method: face-toface interviews at the places of residence of respondents
Method: face to face interviews
Sampling method: multistage stratified random sampling; sample is representative to the general population of Latvia
Stratification criteria: ethnicity, administrative - territorial division of Latvia
Periodicity: one survey per month
Sample size: at least 1000 permanent residents of Latvia 15 (18) to 74 years old. Sample design is based on latest statistics on permanent residents of Latvian Republic.
Respondent selection: random route procedure, every third flat, first birthday rule
Number of sampling points: at least 100
Multistage random sampling is organized in 3 stages:
A definite amount of districts is selected from the list of all (26) the administrative districts of Latvia using the probability sampling. This sample of districts is proportional to the regional division of permanent residents in Latvia:
From the selected districts by the probability sampling the places of residence are selected accordingly the amount of residents and urbanization level.
Number of survey points are defined in every place of residence. In every point interviews in 10 households are realized. Selection of the households is done according with the route specification where the beginning point and principles of the route are defined. The respondent is selected accordingly with the first birthday rule. In the case the selected respondent cannot be interviewed in the moment, the interviewer tries three more contacts with him (her). If these three contacts are not successful, the next respondent is chosen according with the first birthday rule.
Standard social and demographic parameters (included in questionnaire by default):
Language used in family
Average income per month per one household member
Place of residence (Riga, other city, rural areas)
Timing: one survey per month
To include the questions into current Omnibus they should be delivered to SKDS not later than 3rd day of current month.
The fieldwork usually is scheduled for 7 to 10 days and takes place in the second decade of the month.
The data of current Omnibus is available to clients starting from 27th day of current month (in case of raw data). If the reports should be prepared the actual date depends on the form of report and number of questions. Usually it takes 1 2 weeks.
The actual dates can vary slightly in respect of holidays and weekends in current month.