Child Labor Baseline Survey 2010

A two–stage cluster probability sampling design was adopted for the survey. The first stage involved selection of Enumeration Areas (EAs) from the sampling frame and the second stage involved selection of the housing units. The unit of study for the survey was the housing unit defined as the dwelling unit (or units) occupied by one household.

A sampling frame for the study was based on EAs created for the 2009 Population and Housing Census. The frame was created at the demarcation of areas conducted between 2006 and 2007 during cartographic mapping prior to the census enumeration. During mapping, estates or villages were split into EAs, each having an average of 100 households with a minimum of 50 and a maximum of 149 households. The frame therefore had Enumeration Areas (EAs) as the Primary Sampling Unit (PSUs) each Measure of Size (MoS) averaging 100 households.

KNBS hired and trained personnel to undertake the listing process. The interviewers first updated the list of all the households in the selected EAs. Among the variables considered were; Number of household members, age and sex of household heads and population aged 5-17 years. The outcome of this process provided for the basis of sampling of households participating in this survey.

In the sample design, information from the 2009 Kenya Population and Housing Census was utilized to arrive at the sample size. This involved the determination of the population aged 5-17 years. A child labour preference rate of 0.5 was considered to achieve a maximum sample. A design effect of 2 was considered. Further, to determine an appropriate sample, an error margin of 3 % was considered, which resulted into 54 clusters being created in Busia District, 49 clusters being created in Kilifi District, and 55 being created in Kitui District.