Linear Regression with Multiple Regressors 1. Outline Omitted variable bias Population Multiple Regression Model OLS Estimator Measures of fit.
Lecture 26 Omitted Variable Bias formula revisited Specially constructed variables –Interaction variables –Polynomial terms for curvature –Dummy variables.
Linear Regression with Multiple Regressors. Outline Omitted variable bias Population Multiple Regression Model OLS Estimator Measures of fit