* Reference: Chapter 9 of * Jeffrey M. Wooldridge, Introductory Econometrics: A Modern Approach, * South-Western College Publishing, 2000. SAMPLE 1 102 READ (INFMRT.shd) year infmort afdcprt popul pcinc physic afdcper & d90 lpcinc lphysic DC lpopul * Example 9.10 * Restrict the sample to 1990. SET NOWARNSKIP SKIPIF (YEAR.NE.1990) * Log transformations GENR lpcinc=LOG(pcinc) GENR lphysic=LOG(physic) GENR lpopul=LOG(popul) * Equation (9.37), p. 303. OLS infmort lpcinc lphysic lpopul / LINLOG * Drop the District of Columbia SKIPIF (DC.EQ.1) OLS infmort lpcinc lphysic lpopul / LINLOG * Note: LAD estimation as discussed on pages 304-305 is available * in SHAZAM with the ROBUST command. STOP