years xi: reg vhappy i.SEX*i.YEAR[aw=wt] if YEAR==1972 | YEAR==2006 xi: reg unhappy i.SEX*i.YEAR [aw=wt] if YEAR==1972 | YEAR==2006 Ha ha ha ha, here's a little regression theory for you guys! (Get it? Blow me! Don't you think I'd be happier if you could ?) Maybe the real happiness gap started setting