Unbiased instrumental variables estimation under known first-stage sign
We derive mean-unbiased estimators for the structural parameter in instrumental variables models with a single endogenous regressor where the sign of one or more first-stage coefficients is known. In the case with a single instrument, there is a unique nonrandomized unbiased estimator based on the r...
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| Format: | Article |
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The Econometric Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/113709 |