Endogeneity and misspecification of models are two main concerns in structural estimation, which usually involves the optimal choices of economic agents with unobservable characteristics. In estimating production functions, input variables are endogenous because input decisions depend on...

Nonparametric function estimation via local polynomial regression has been widely studied in the literature, especially in the past two decades. In practice, we confront two challenges. Firstly, the local least squares estimator may not be the best choice when errors are heavily tailed....