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The review of economics and statistics / publ. for Harvard University
2
Propensity score-matching methods for nonexperimental causa..:
, In:Copies: Zentrale;
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Causal effects in non-experimental studies
re-evaluating the evaluation of training programs
NBER working paper series ; 6586
Copies:
Zentrale:Magazin bc 1286-6586
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4
Propensity score matching methods for non-experimental caus..
NBER working paper series ; 6829
Copies:
Zentrale:Magazin bc 1286-6829