期刊
REVIEW OF ECONOMICS AND STATISTICS
卷 95, 期 3, 页码 932-945出版社
MIT PRESS
DOI: 10.1162/REST_a_00318
关键词
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This paper presents genetic matching, a method of multivariate matching that uses an evolutionary search algorithm to determine the weight each covariate is given. Both propensity score matching and matching based on Mahalanobis distance are limiting cases of this method. The algorithm makes transparent certain issues that all matching methods must confront. We present simulation studies that show that the algorithm improves covariate balance and that it may reduce bias if the selection on observables assumption holds. We then present a reanalysis of a number of data sets in the LaLonde (1986) controversy.
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