cdD:\CHNStata
use c12hhinc.dta
sort hhidcommid wave
bys hhid commid wave: g n=_n
bys hhidcommid wave: g N=_N
keepif n==N
drop nN
sort hhidcommid wave
save temp1
clear
use m12hlth.dta
sort hhidcommid wave
bys hhid commid wave: g n=_n
bys hhidcommid wave: g N=_N
keepif n==N
drop nN
sort hhidcommid wave
save temp2
use temp1
merge1:1 hhid commid wave using temp2
drop_merge
erasetemp1.dta
erasetemp2.dta
savehhinc_health