期刊名称：DIW Diskussionspapiere / Deutsches Institut für Wirtschaftsforschung, Berlin
出版年度：2007
卷号：2007
出版社：Deutsches Institut für Wirtschaftsforschung, Berlin
摘要：This paper assesses the dynamics of treatment effects arising from variation in
the duration of training. We use German administrative data that have the
extraordinary feature that the amount of treatment varies continuously from 10
days to 395 days (i.e. 13 months). This feature allows us to estimate a
continuous dose-response function that relates each value of the dose, i.e. days
of training, to the individual post-treatment employment probability (the
response). The dose-response function is estimated after adjusting for covariate
imbalance using the generalized propensity score, a recently developed method
for covariate adjustment under continuous treatment regimes. Our data have the
advantage that we can consider both the actual and planned training durations as
treatment variables: If only actual durations are observed, treatment effect
estimates may be biased because of endogenous exits. Our results indicate an
increasing dose-response function for treatments of up to 100 days, which then
flattens out. That is, longer training programs do not seem to add an additional
treatment effect
关键词：Training, program evaluation, continuous treatment, generalized propensity score
