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Errors in the Dependent Variable of Quantile Regression Models
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DOI：10.3982/ECTA14667.png)
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We study the consequences of measurement error in the dependent variable of random-coefficients models, focusing on the particular case of quantile regression. The popular quantile regression estimator of Koenker and Bassett (1978) is biased if there is an additive error term. Approaching this problem as an errors-in-variables problem where the dependent variable suffers from classical measurement error, we present a sieve maximum likelihood approach that is robust to left-hand-side measurement error. After providing sufficient conditions for identification, we demonstrate that when the number of knots in the quantile grid is chosen to grow at an adequate speed, the sieve-maximum-likelihood estimator is consistent and asymptotically normal, permitting inference via bootstrapping. Monte Carlo evidence verifies our method outperforms quantile regression in mean bias and MSE. Finally, we illustrate our estimator with an application to the returns to education highlighting changes over time in the returns to education that have previously been masked by measurement-error bias.
Keyword:
Measurement error
quantile regression
functional analysis
期刊
IF:
7.1
论文数:
3.0K
被引数:
4.3W
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