Sampling procedure
The Establishment Census, conducted as part of the 2006 Population, Housing, and Establishment Census, utilized the framework established by the aforementioned census. This framework specifically encompassed active and temporarily closed establishments, excluding government-run ones. Seven distinct frameworks were employed, covering a total of 164,000 establishments to ensure comprehensive coverage:
1. The frame was bifurcated into two sections: the first comprising active establishments and the second consisting of temporarily closed ones.
2. Monitoring of small-sized establishments occurred in two stages: initially, a sample of enumeration areas (1,800 in total) was selected, representing 10% of the total enumeration areas in the 2006 establishments census. Subsequently, a sample of establishments was chosen from each economic activity at the ISIC tabular category level within each enumeration area, totaling 96,000 establishments.
Rare activities' establishments, specifically those with 500 or fewer establishments distributed across the governorates were included.
3. A comprehensive inventory of establishments employing 10 or more workers and not included in the current statistics, based on the 2006 Establishment Census data, with a total of 18,000 establishments
4. The Educational Activity Establishments category involved a comprehensive inventory of private schools, universities, higher and intermediate institutes. This included 6,000 schools, 19 universities, around 250 colleges and higher institutes, as well as upper-intermediate institutes.
5. Health Activity Establishments entailed a sample size of 14,000 establishments, representing 20% of the total framework of clinics, medical centers, and analysis laboratories in the private sector. These were selected and drawn from the Ministry of Health.
6. Active Big Establishments for wholesale and retail trade underwent a comprehensive inventory. This encompassed various legal entities such as joint stock, limited liability, limited partnership, and branches of foreign companies, totaling approximately 10,000 establishments.
7. Mining and quarrying activities were also subject to a comprehensive inventory. This covered establishments operating in the field of mines and quarries, which were not included in the regular statistics, amounting to around 2,000 establishments.
Weighting
Since the selected sample is not self-weighted and and exhibits varying response rates within each stratum,it becomes imperative to compute weights in order to derive economic results or indicators at the national, governorate, and economic activity levels. For specific information on how these weights were calculated, please refer to the enclosed documents.
Furthermore, adjustments to the weights were made to accommodate the 50% subsample of the original data.