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Article
Sampling for Subpopulations in Two-Stage Surveys
Centre for Statistical & Survey Methodology Working Paper Series
  • Robert Graham Clark, University of Wollongong
Publication Date
1-1-2008
Publication Details

This working paper was subsequently revised and published as Clark, R.G. (2009). Sampling of subpopulations in two stage surveys. Statistics in Medicine, Vol. 28, Issue 28, pp. 3697-3717, DOI: 10.1002/sim.3723.

Abstract

Many national household interview surveys aim to produce statistics on small subpopulations, such as specific ethnic groups or the indigenous population of a country. In most countries, there is no reliable frame of the sub-populations of interest, so it is necessary to sample from the general population, which can be very expensive. The most common strategies used in practice for sampling rare subpopulations are the use of a large screening sample, and dis-proportionate sampling by strata. Optimal sample designs have been derived for the case of one-stage sampling, but most household surveys use two or more stages of selection. This paper develops optimal designs for two-stage sampling, where there is auxiliary information on subpopulation membership for each primary sampling unit. Various alternative designs are evaluated using a simulated population derived from the New Zealand Census.

Citation Information
Robert Graham Clark. "Sampling for Subpopulations in Two-Stage Surveys" (2008)
Available at: http://works.bepress.com/robert_clark/14/