好吧,虽然我水平较差,但还是摸索了一点出来,不知道是不是正确的,但好像满足我的要求了,供参考:
set more off
set mem 128
clear
use modellast
sort hhi_v8
xtile hhi1=hhi_v8, nq(3)
sort inssum
xtile inssum1=inssum, nq(3)
gen dum=1 if hhi1==3&inssum1==1
replace dum=0 if hhi1==1&inssum1==3
save dummy,replace