Hello,

I'm trying to calculate H-statistic for banking sector within a country for 11 years period. I have find the H-statistic for the entire period by using random effect panel data after doing Hausman test.
Currently, I'm facing problem in calculating H-statistic for banking sector in yearly basis. Stata keep telling me that (insufficient observations). Each year I have 11 banks with 8 variables.

How can I estimate the H-statistic on yearly basis with small number of observations?

Thanks in advance,