RT Journal Article
SR Electronic
T1 What Can Ex-Participants Reveal about a Program’s Impact?
JF Journal of Human Resources
JO J Hum Resour
FD University of Wisconsin Press
SP 208
OP 230
DO 10.3368/jhr.40.1.208
VO 40
IS 1
A1 Ravallion, Martin
A1 Galasso, Emanuela
A1 Lazo, Teodoro
A1 Philipp, Ernesto
YR 2005
UL http://jhr.uwpress.org/content/40/1/208.abstract
AB We propose a method for estimating the mean impact of an assigned social program when it is not feasible to do a pre-intervention baseline survey but it is feasible to track ex-participants. In our triple-difference estimator, measured outcome changes are compared between continuing participants and matched ex-participants, after netting out the outcome changes for a matched comparison group who never participated. With sufficient followup observations one can test the joint conditions required for correctly identifying the gains to current participants. We apply the method to a workfare program in Argentina. Significant impacts on participants’ current incomes are revealed.