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Controlling for overlap in matching

Pawel Strawinski ()

No 2013-10, Working Papers from Faculty of Economic Sciences, University of Warsaw

Abstract: The overlap problem is crucial in propensity score matching. Recently, Crump et al. (2009) showed that trimming provides a simple and robust solution to the overlap problem. In this study, we use a simulation approach to show that trimming is inferior to the caliper mechanism. We show that in most cases, both techniques provide unbiased estimates, but trimming is less efficient.

Keywords: average treatment effect; overlap; propensity score; caliper; trimming. (search for similar items in EconPapers)
JEL-codes: C14 C15 (search for similar items in EconPapers)
Pages: 15 pages
Date: 2013
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http://www.wne.uw.edu.pl/inf/wyd/WP/WNE_WP95.pdf First version, 2013 (application/pdf)

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Persistent link: https://EconPapers.repec.org/RePEc:war:wpaper:2013-10

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