fica taxble (ws & se) or total w-2 (ws)
rsn interval, 5 numbers wide
number of obs in cell calculations
Weight with corrected variance
Weight to use to reproduce Angrist (1990)
74 ern
75 ern
76 ern
77 ern
78 ern
79 ern
80 ern
81 ern
82 ern
83 ern
84 ern