Abstract

http://ssrn.com/abstract=242121
 
 

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Bootstrap Tests for the Effect of a Treatment on the Distribution of an Outcome Variable


Alberto Abadie


Harvard University - Harvard Kennedy School (HKS); National Bureau of Economic Research (NBER)

September 2000

NBER Working Paper No. t0261

Abstract:     
This paper considers the problem of assessing the distributional consequences of a treatment on some outcome variable of interest when treatment intake is (possibly) non-randomized but there is a binary instrument available for the researcher. Such scenario is common in observational studies and in randomized experiments with imperfect compliance. One possible approach to this problem is to compare the counterfactual cumulative distribution functions of the outcome with and without the treatment. Here, it is shown how to estimate these distributions using instrumental variable methods and a simple bootstrap procedure is proposed to test distributional hypotheses, such as equality of distributions, first-order stochastic dominance and second order stochastic dominance. These tests and estimators are applied to the study of the effects of veteran status on the distribution of civilian earnings. The results show a negative effect of military service in Vietnam that appears to be concentrated on the lower tail of the distribution of earnings. First order stochastic dominance cannot be rejected by the data.

Number of Pages in PDF File: 21

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Date posted: September 16, 2000  

Suggested Citation

Abadie, Alberto, Bootstrap Tests for the Effect of a Treatment on the Distribution of an Outcome Variable (September 2000). NBER Working Paper No. t0261. Available at SSRN: http://ssrn.com/abstract=242121

Contact Information

Alberto Abadie (Contact Author)
Harvard University - Harvard Kennedy School (HKS) ( email )
79 John F. Kennedy Street
Cambridge, MA 02138
United States
617-496-4547 (Phone)
617-495-2575 (Fax)
National Bureau of Economic Research (NBER)
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
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