The third Employment and Informal Sector Survey (EESI3) is a two-stage statistical survey, the first of which aims to capture employment (Employment Survey) and the second to assess the economic activities of the non-agricultural informal sector (Informal Sector Survey). The first EESI-type survey was carried out in 2005 and the second in 2010. The geographical scope of this operation is the entire national territory. For the technical requirements of the survey, the national territory was divided into 12 survey regions: the cities of Douala and Yaoundé, Adamaoua, the Centre without Yaoundé, the East, the Far North, the Littoral without Douala, the North, the North-West, the West, the South and the South-West. The primary sampling frame is made up of all the enumeration zones (ZD) delimited during the mapping work carried out in 2017 as part of the 4th RGPH. A total of 882 DZs out of nearly 21,826 were selected and visited. The sampling plan was stratified at two levels. At the first stage, 882 DZs were selected for inclusion in the sample. At the second stage, 10,642 households were selected from the DZs retained.
The strata were formed by combining the 12 survey regions and the stratum of residence (urban, semi-urban, rural). A total of 32 strata were defined. Three data collection media were used: the household sheet and the individual questionnaire for people aged 10 or over (phase 1), and the questionnaire for the informal production unit (phase 2). The Employment Survey (phase 1) successfully surveyed 8,738 households out of the 10,060 drawn. In these households, the survey covered all persons aged 10 or over. The Informal Sector Survey (phase 2) identified 4,762 non-agricultural informal production units (IPUs) and surveyed 4,576, giving a coverage rate of 96.1%. These IPUs had already been identified in phase 1 (employment survey). The two phases of the survey took place at the same time. Data collection in the field took place from 10 May to 10 July 2021. Data was collected using the CAPI (Computer Assisted Personal Interviewing) method. This was followed by work to clear the files, enabling the indicators to be produced.

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