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Treatment Evaluation with Selective Participation and Ineligibles

Authors: Monica Costa Dias , Hidehiko Ichimura and Gerard Van Den Berg
Date: 01 January 2013
Type: Journal article, Journal of the American Statistical Association, Vol. 108, No. 502, pp. 441-445
DOI: 10.1080/01621459.2013.795447


Matching methods for treatment evaluation based on a conditional independence assumption do not balance selective unobserved differences between treated and non-treated. We derive a simple correction term if there is an instrument that shifts the treatment probability to zero in special cases. Policies with eligibility restrictions, where treatment is impossible if some variable exceeds a certain value, provide a natural application. In an empirical analysis, we exploit the age eligibility restriction in the Swedish Youth Practice subsidized work program for young unemployed, where compliance is imperfect among the young. Adjusting the matching estimator for selectivity changes the results towards making subsidized work detrimental in moving individuals into employment.


Figure: Hazard rates into YP by duration of enemployment spell and age at registration with employment office


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Monica Costa Dias, Hidehiko Ichimura and Gerard Van Den Berg November 2010, The matching method for treatment evaluation with selective participation and ineligibles, cemmap Working Paper

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