Local Regression and Likelihood Separation of signal from noise is the most fundamental problem in data analysis and arises in many fields for example signal processing econometrics acturial science and geostatistics. This book introduces the local regression method in univariate and multivariate settings and extensions to local likelihood and density estimation. Basic theoretical results and diagnostic tools such as cross validation are introduced along the way. Examples illustrate the implementation of the methods using the LOCFIT software. The Origins of Local Regression Local Regression Methods Fitting with LOCFIT Local Likelihood Estimation Density Estimation Flexible Local Regression Survival and Failure Time Analysis Discrimination and Classification Variance Estimation and Goodness of Fit Bandwidth Selection Adaptive Parameter Choice Computational Methods Optimizing Local Regression.