倍差法STATA命令PDF下载
Abstract. This paper explains the insightsof the Stata's user written command diff for
the estimation of Difference in Differencestreatment effects (DID). The options and the
formulas are detailed for the single DID,Kernel Propensity Score DID, Quantile DID and the
balancing properties . An example of thefeatures of diff is presented by using the dataset
from Card and Krueger (1994).
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