use D:\w.dta,clear
spmat dta w var*,replace
spmat summarize w, links
spatwmat using D:\w.dta,name(w) standardize
use D:\7.5回归.dta
destring *, replace
xtset id year
xsmle d mmx_dra mmx_pergdp mmx_ava mmx_ale mmx_aad mmx_covid mmx_pattent mmx_farnumdra mmx_coopfarnum agrlevel ass main, model(sdm) wmat(w) type(both) nolog effects fe