Many states now conduct state household surveys to estimate health insurance coverage and some states have begun exploring methods to derive coverage estimates for different populations, specifically for geographic areas (regions, counties) and racial/ethnic sub-populations within their borders. The purpose of this issue brief is to highlight three approaches that have been used to estimate uninsurance rates at the sub-state level. We provide an overview of the conceptual and methodological issues involved in estimating uninsurance rates at the sub-state level, assess the relative strengths and weaknesses of each approach and conclude with a list of resources useful to readers interested in learning more about small-area estimation.
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