I am using stata v 11, and trying this code , xtmelogit N1 i.HW3 i.m18n i.Bm11 i.V212 i.Vm445 i.Mn14 i.Mm4 i.v149 i.v714n i.v729 i.Vn705 i.v024 i.v025 i.v190 i.Mn15, || b4:, covariance(independent) or
But its not working. Taking too much time to show any ourput. What should i do now?