[Dany Shakeel]

This is a better code. Some corrections can make it perfect. For example for cid 537452903 the value of treathome is zero, but the individual was in homeschool at grade 6.

[Dany Shakeel]

Simiarly, for cid 537453243 the individual was in public school from grades 8 to 11 (4 years), but the value of treat pub is 3 years only

[Øyvind Snilsberg]

I guess we need to subtract 1 from q37_1 and q38_1,

bys cid (grade): gen x = grade>=q37_1-1 & grade<=q38_1-1

bys cid (grade): egen treatpub = total(x & inlist(q7_,1,5))
bys cid (grade): egen treatpriv = total(x & inlist(q7_,2,3,4))
bys cid (grade): egen treathome = total(x & q7_==6)

[Dany Shakeel]

That solved one problem, but raised another one. For cid 537452953 treatpriv should be 9 years, but it shows 8 years.