Journal
JOURNAL OF ECONOMETRICS
Volume 235, Issue 2, Pages 1087-1113Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jeconom.2022.10.001
Keywords
Self-selection; Roy model; Nonseparable model; Nonparametric identification; Treatment effect
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The paper proposes a new identification method for the extended Roy model that considers agents' utility maximization rather than just their outcomes. The joint distribution of potential outcomes is nonparametrically identified, which is crucial for causal inference. The identification is achieved by matching indifferent agents across choices using the local instrumental variable method, without requiring any functional form assumption or support assumption. Based on the identification result, the paper proposes an easy-to-implement nonparametric simulation-based estimator and derives its convergence rate. An empirical illustration on Malawian farmers' hybrid maize adoption is provided.
We propose a new identification method for the extended Roy model, in which the agents maximize their utility rather than just their outcome. We nonparametrically identify the joint distribution of potential outcomes, which is of great importance in causal inference. We exploit the extended Roy model structure and the monotonicity assumption but do not require any functional form assumption nor any support assumption. The identification is achieved by matching the indifferent agents across choices, who are identified by the local instrumental variable method. Based on the identification result, we propose an easy-to-implement nonparametric simulation-based estimator and derive its convergence rate. An empirical illustration on Malawian farmers' hybrid maize adoption is provided.& COPY; 2022 Published by Elsevier B.V.
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