PMG insufficient observation

[marwan Alssadek]

Hi everyone,

I was trying to run panel under PMG effect. N= 36 over the time period 1984-2016. When I run the command for the full panel, it is fine. But, in the case of developed and developing countries, I got this message: insufficient observations r(2001). Anyone has idea or suggestion. Please,

Regards,
Marwan

[Cassie Liu]

Have you already solved your problem?I have the same question with you and don't know how to do.