Efficient estimation Regression analysis 2 Sampling 2 Asymptotic properties 1 Asymptotic variance 1 Benchmarking 1 Change-of-basis 1 Communication channels (information theory) 1 Conditional heteroskedasticity 1 Correlation structure 1 Economics 1 Efficiency 1 Efficiency gain 1 Finite sample performance 1 Fixed effects 1 Fundamental component 1 Heterogeneity 1 Heterogeneous slopes 1 Heteroskedasticity 1 Iterative methods 1 K-means clustering 1 Local polynomial estimation 1 Local polynomial estimations 1 Local polynomial regression 1 Non-parametric regression 1 Non-separability 1 Nonparametric regression 1 Panel data 1 Polynomials 1 Quantile regression 1