计量经济学PPT-4.2.pdf

BEE1023 - Introduction to Econometrics Announcement: The deadline for Assessment 2 is Friday, 9 pm. The mark of the students that do not submit their Assignment will be zero. Warning to the students that did not submit the first Assignment: Your Assessment is based on a exam (90%) and also on five Assignments based on multiple choice questions. Only the four best Assignments will count and each assignment will count for 2.5% of the final mark. 1 / 22 BEE1023 - Introduction to Econometrics Topics: Multiple Regression Analysis Ordinary Least Squares (OLS) Estimator Interpreting Multiple Regression Simple vs Multiple Regression Estimate A “Partialling Out” Interpretation Goodness-of-Fit Assumptions for Unbiasedness Variance of the OLS Estimators Estimating the Error Variance The Gauss-Markov Theorem 2 / 22 Multiple Regression Analysis Now we extend the simple linear regression model to allow for more than one independent variable(more than one regressor) to influence the dependent variables: Example 1: wages = + education + exper + u 0 1 2 where wageshourly wages education schooling years exper years of experience Example 2: housep = + size + bdrms + bthrms + u 0 1 2 3 where housep house price size size of the house bdrmsnumber of bedrooms bthrmsnumber of bathrooms