Bounds on treatment effects on transitions
AbstractThis paper considers the definition and identification of treatment effects on conditional transition probabilities. We show that even under sequential random assignment only the instantaneous average treatment effect is point identified. Because treated and control units drop out at different rates, randomization only ensures the comparability of treatment and controls at the time of randomization, so that long run average treatment effects are not point identified. Instead we derive informative bounds on these average treatment effects. Our bounds do not impose (semi)parametric restrictions, as e.g. proportional hazards, that would narrow the bounds or even allow for point identification. We also explore various assumptions such as monotone treatment response, common shocks and positively correlated outcomes.
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Bibliographic InfoPaper provided by IFAU - Institute for Evaluation of Labour Market and Education Policy in its series Working Paper Series with number 2011:6.
Length: 55 pages
Date of creation: 25 Mar 2011
Date of revision:
Partial identification; duration model; randomized experiment; treatment effect;
Other versions of this item:
- C14 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Semiparametric and Nonparametric Methods: General
- C41 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Duration Analysis; Optimal Timing Strategies
This paper has been announced in the following NEP Reports:
- NEP-ALL-2011-06-11 (All new papers)
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- Vikström, Johan & Rosholm, Michael & Svarer, Michael, 2013. "The effectiveness of active labor market policies: Evidence from a social experiment using non-parametric bounds," Labour Economics, Elsevier, vol. 24(C), pages 58-67.
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