Data are males born in Q3 or Q4 of 1924, 1926, or 1928 from the 1980 public-use 5% microsample of the Census, via IPUMS.
birthyr = year of birth
birthqtr = quarter of birth
vetwwii = 0/1 veteran of WWII era
incwage = wage and salary income in nominal dollars, topcoded at 75,000
disabwrk1 = 0/1 any disability limits work
disabwrk2 = 0/1/2 disability limits (1) or prevents (2) work