"regress logwage education dum1930 dum1931 dum1932 dum1933 dum1934 dum1935 dum1936 dum1937 dum1938"
Now I need to run a 2SLS using quarter-of-birth dummies as instruments for years of education. Furthermore, I am instructed that "Instruments are a full set of quarter-of-birth times year-of-brith interactions".
I have been trying to use something that uses dummy variables for the quarters of birth but not getting the correct answers:
"ivreg logwage dum1931 dum1932 dum1933 dum1934 dum1935 dum1936 dum1937 dum1938 dum1939 (education = dumqob1 dumqob2 dumqob3)"
I have never done 2SLS before and am grateful for your help!
The data below is Quarter of Birth, Year of Birth, Education Level, Log Weekly Wage
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input byte qob int yob byte education float logwage 1 1933 12 6.245846 4 1933 12 5.847161 1 1930 12 6.645516 1 1933 16 6.706133 4 1937 14 6.357876 4 1935 12 5.441835 1 1938 12 6.39066 1 1930 12 4.607667 3 1939 12 6.553961 2 1936 7 7.017041 3 1934 14 6.39066 4 1934 13 6.935289 4 1935 16 6.533516 3 1937 12 6.030926 1 1937 10 6.252533 4 1935 20 7.313221 1 1938 12 6.594229 1 1933 13 6.088502 2 1937 12 6.32398 3 1936 12 6.725576 1 1938 12 5.522127 4 1931 12 4.643836 2 1936 9 5.790019 3 1936 1 4.903136 3 1930 6 5.259596 1 1934 1 5.259596 1 1939 6 4.998381 4 1939 14 6.175587 1 1934 8 5.847161 4 1931 6 5.434904 3 1932 9 6.190276 1 1939 7 2.144956 3 1937 11 5.154292 2 1930 12 5.729413 4 1934 6 5.076735 1 1936 10 4.829082 4 1939 11 5.824032 3 1934 6 5.216794 1 1939 7 4.973191 2 1935 9 4.86191 4 1936 12 5.441835 1 1939 8 5.561051 4 1935 12 4.1905284 1 1931 13 5.691204 2 1934 8 5.847161 2 1936 13 6.254921 3 1935 14 5.036578 1 1932 12 4.526169 1 1933 14 5.48264 2 1934 11 5.886382 2 1936 6 4.895349 1 1938 11 5.426651 4 1937 11 5.259596 4 1931 6 4.771743 1 1934 16 6.175587 4 1935 14 6.092223 3 1931 18 5.693662 4 1935 12 5.664895 2 1938 18 6.115849 3 1937 13 5.595926 4 1937 10 5.108855 2 1935 16 6.134774 2 1938 9 6.195386 2 1937 12 4.701389 2 1931 17 6.033475 3 1931 16 4.3075624 3 1939 12 4.972081 4 1936 15 4.607667 2 1931 12 5.154292 3 1934 10 4.0539565 4 1935 14 5.162243 2 1931 14 5.906462 3 1936 14 5.952494 2 1934 12 5.729413 3 1936 12 5.465704 1 1937 11 5.259596 4 1934 9 1.920874 4 1932 11 5.259596 1 1933 18 5.812119 3 1939 7 4.566949 4 1930 16 5.559572 2 1933 12 -2.3418057 3 1931 7 4.202202 3 1939 12 4.958667 3 1932 18 6.483019 1 1936 6 5.331882 3 1930 10 4.838264 4 1935 9 7.46365 1 1931 12 5.683383 2 1939 12 5.095193 4 1933 4 4.4616995 2 1934 16 6.357876 2 1933 12 5.927342 3 1934 6 2.961499 3 1933 10 4.972081 1 1933 6 4.749104 4 1939 12 5.635147 1 1939 10 5.481056 1 1935 10 5.496143 2 1938 9 5.664895 end
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