Journal
JOURNAL OF LABOR ECONOMICS
Volume 34, Issue 2, Pages 509-543Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/683668
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Authors often add covariates to a base model sequentially either to test a particular coefficient's robustness or to account for the effects on this coefficient of adding covariates. This is problematic, due to sequence sensitivity when added covariates are intercorrelated. Using the omitted variables bias formula, I construct a conditional decomposition that accounts for various covariates' role in moving base regressors' coefficients. I also provide a consistent covariance formula. I illustrate this conditional decomposition with NLSY data in an application that exhibits sequence sensitivity. Related extensions include instrumental variables, the fact that my decomposition nests the Oaxaca-Blinder decomposition, and a Hausman test result.
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