Research output: Contribution to journal › Article
Nonparametric Estimation of Conditional Quantile Functions in the Presence of Irrelevant Covariates. / Chen, Xirong; Li, Degui; Li, Qi; Li, Zheng.
In: Journal of Econometrics, Vol. 212, No. 2, 10.2019, p. 433-450.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Nonparametric Estimation of Conditional Quantile Functions in the Presence of Irrelevant Covariates
AU - Chen, Xirong
AU - Li, Degui
AU - Li, Qi
AU - Li, Zheng
PY - 2019/10
Y1 - 2019/10
N2 - Allowing for the existence of irrelevant covariates, we study the problem of estimatinga conditional quantile function nonparametrically with mixed discrete and continuous data. We estimate the conditional quantile regression function using the check-function-based kernel method and suggest a data-driven cross-validation (CV) approach to simultaneously determine the optimal smoothing parameters and remove the irrelevant covariates. When the number of covariates is large, we first use a screening method to remove the irrelevant covariates and then apply the CV criterion to those that survive the screening procedure. Simulations and an empirical application demonstrate the usefulness of the proposed methods.
AB - Allowing for the existence of irrelevant covariates, we study the problem of estimatinga conditional quantile function nonparametrically with mixed discrete and continuous data. We estimate the conditional quantile regression function using the check-function-based kernel method and suggest a data-driven cross-validation (CV) approach to simultaneously determine the optimal smoothing parameters and remove the irrelevant covariates. When the number of covariates is large, we first use a screening method to remove the irrelevant covariates and then apply the CV criterion to those that survive the screening procedure. Simulations and an empirical application demonstrate the usefulness of the proposed methods.
U2 - 10.1016/j.jeconom.2019.04.037
DO - 10.1016/j.jeconom.2019.04.037
M3 - Article
VL - 212
SP - 433
EP - 450
JO - Journal of Econometrics
JF - Journal of Econometrics
SN - 0304-4076
IS - 2
ER -