* More Work with the Multiple Regression Model * Reference: Chapter 8 of * R. Carter Hill, William E. Griffiths and George G. Judge, * Undergraduate Econometrics, Second Edition, Wiley. * Weekly observations on Revenue, Price and Advertising SAMPLE 1 78 READ (CHAP8-3.shd) TR P A GENR A2=A*A * Estimation results for Equation (R8.4) p.177 SAMPLE 1 52 OLS TR P A A2 * Now use the extended data set. SAMPLE 1 78 * Estimation results for Equation (R8.5) p.178 OLS TR P A A2 * Test the significance of advertising (Section 8.4.1, p.178-179) TEST TEST A=0 TEST A2=0 END * Test the optimal level of advertising (Section 8.4.2) TEST A+80*A2=1 * Test the optimal level of advertising and price (Section 8.4.3) TEST TEST A+80*A2=1 TEST CONSTANT + 2*P +40*A +1600*A2 = 175 END STOP