Dear Stata Users,

I'm trying to estimate technical efficiency with -sfpanel post estimation command predict, bc. sfpanel y x1 x2 x3, model(bc95) command works out fine and provides me with estimation results however after the estimation when I try to estimate technical efficiency using predict technicaleff, bc I get this: (201 missing values generated)

when I browse technicaleff there are no estimation results. What could be the problem here?

Thanks in advance.