xtabond2 lnasset L.lnasset lnycjc edujt hy health zg old jtcsr i.year, gmmstyle( L.lnasset
> ) ivstyle( lnycjc jtcsr CX edujt hy old zg health ) noleveleq
出现Favoring space over speed. To switch, type or click on mata: mata set matafavor speed, perm.
No observations.
r(2000);
求教