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Unformatted text preview: 1 Problem Set II For this problem set you will have to use the data set TWINSAK 2004.MAT which is available on the website for the course. These data were collected and analyzed by Ashenfel- ter and Krueger in a study of twins ( American Economic Review , Vol. 84, No. 5. Dec., 1994, pp. 1157-1173.). The data set has 143 observations on six variables, lwage1 (log weekly wage for first member of twin pair), lwage2 (log weekly wage for second member of twin pair), educ1 (years of education for first member of twin pair), educ2 (years of education for second member of twin pair), age (age of twins), male1 (gender of twins which is identical for both given that all twin pairs are monozygotic in this subsample). 1. Treat both members of the twin pairs as independent observations and estimate a linear regression function for log wages on a constant, years of education, age and age-squared. Report conventional and heteroskedasticity robust standard errors....
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This note was uploaded on 07/22/2008 for the course ECON 513 taught by Professor Rashidian during the Fall '07 term at USC.
- Fall '07