{"kind":"user","text":"Angrist and Krueger (1991), 'Does Compulsory School Attendance Affect Schooling and Earnings?', Table V, column (2): for men born in 1930-1939 in the 1980 Census, estimate by two-stage least squares the return to education, the effect of years of education on the log of weekly earnings. Use as instruments a full set of quarter-of-birth times year-of-birth interactions (each of the first three quarters of birth interacted with each of the ten years of birth), and include nine year-of-birth dummies and an intercept as the only other regressors. Report the coefficient on years of education."}