Help Panel Var..can't get over this!!

[maria barsan]

Hello guys,

I don't know if someone will be so nice to help me with this, but I'm trying to get to a point for days. I need to compute the ire for this dataset and every time stata gives me an error message, "equation not fount" ""type mismatch" "derivative already defined", I don't know how can I do it.

Can someone help me o give me some hint?

I really need your help.

[Jorrit Gosens]

For help with this, please post n example of your data with dataex, see the FAQ on how and why: https://www.statalist.org/forums/help#stata
Also post the code that you have used, so people can point out the errors.