Panel System

[zsalimian]

Dear Professor

I have panel data (T=11,N=23) and I want to esmite translog cost share functions simultanously.these functions are as follows:

Equation i: Sint=cin+bi*log(ynt)+ai*log(pint) (i=1,2,3 for labor,capital and energy) (t=1,...,11) (n=1,...,23)

i=1,2,3 so we will have 3 equations,How can I estimate these functions in a panel system simoultanously?