A Comparison of EPI Sampling, Probability Sampling, and Compact Segment Sampling Methods for Micro and Small Enterprises |
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Authors: | Chao Li-Wei Szrek Helena Peltzer Karl Ramlagan Shandir Fleming Peter Leite Rui Magerman Jesswill Ngwenya Godfrey B Pereira Nuno Sousa Behrman Jere |
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Institution: | Population Studies Center, University of Pennsylvania, 3718 Locust Walk, Room 239, Philadelphia, Pennsylvania 19104-6298, U.S.A. |
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Abstract: | Finding an efficient method for sampling micro- and small-enterprises (MSEs) for research and statistical reporting purposes is a challenge in developing countries, where registries of MSEs are often nonexistent or outdated. This lack of a sampling frame creates an obstacle in finding a representative sample of MSEs. This study uses computer simulations to draw samples from a census of businesses and non-businesses in the Tshwane Municipality of South Africa, using three different sampling methods: the traditional probability sampling method, the compact segment sampling method, and the World Health Organization's Expanded Programme on Immunization (EPI) sampling method. Three mechanisms by which the methods could differ are tested, the proximity selection of respondents, the at-home selection of respondents, and the use of inaccurate probability weights. The results highlight the importance of revisits and accurate probability weights, but the lesser effect of proximity selection on the samples' statistical properties. |
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Keywords: | L26 C83 O17 I10 J23 |
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