Wang, Xiaoying; Jiang, Song; Yin, Junping - In: Journal of Multivariate Analysis 105 (2012) 1, pp. 258-275
This paper is concerned with the conditional bias and variance of local quadratic regression to the multivariate predictor variables. Data sharpening methods of nonparametric regression were first proposed by Choi, Hall, Roussion. Recently, a data sharpening estimator of local linear regression...