4 Nonparametric Regression
4.1 Univariate Kernel Regression
4.1.1 Introduction
4.1.2 Kernel Regression
4.1.3 Local Polynomial Regression and Derivative Estimation    
4.2 Other Smoothers
4.3 Smoothing Parameter Selection
4.4 Confidence Regions and Tests
4.5 Multivariate Kernel Regression