[Limdep Nlogit List] Non-independence of observations

[Åsa Lindman]

Dear list, I´m carrying out a meta analysis, and I´m a concerned about how I should address the potential problem of non-independence of observations from the same primary studies in the LIMDEP software. I have about 80 observations from about 15-20 studies. Can you please provide me with a step-by-step guide on how to address this problem? 

I would greatly appreciate your help!

Åsa