A Distributional Analysis of Treatment Effects on Subpopulations of a Socioeconomic Experiment

Marcel Voia, Liqun Wang and Ricardas Zitikis ()
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Ricardas Zitikis: Department of Statistical and Actuarial Sciences, University of Western Ontario, http://www.stats.uwo.ca/faculty/zitikis/main.htm

No 09-02, Carleton Economic Papers from Carleton University, Department of Economics

Abstract: When analyzing treatment effects, the average treatment value is frequently compared to that of the control group. This approach, naturally, is not particularly informative about specifc regions of the treatment and control distributions. For this reason and having in view a specifc application, in the present paper we consider tests that provide us with more detailed analysis of treatments and their effectiveness. The tests are based on comparing the treatment and control distributions (e.g., whether they are equal, one dominates another, or intersect) over their entire or partial domains of definition. The test of intersection of distributions is introduced in the paper with the scope of pinpointing the region of the tested distribution that is subject to an adverse treatment effect. We illustrate the tests on a simulation study which is based on a matched data and apply them to analyze the Pennsylvania Bonus Experiment.

Keywords: Stochastic dominance; effective treatment; testing for intersection (search for similar items in EconPapers)
JEL-codes: C12 D31 D63 (search for similar items in EconPapers)
Pages: 25 pages
Date: 2009-04-23, Revised 2010-02-05
New Economics Papers: this item is included in nep-exp
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Published: Carleton Economic Papers

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