xtpmg "initial values not feasible"

[Zakaria Zoundi]

hi all,
im running the following command: xtpmg D.nacab D.aidbop D.lntot, lr( L.nacab L.aidbop L.lntot) pmg replace
but stata keeps telling INITIAL VALUES NOT FEASIBLE. I don't understand the reason. any help please.

[Nick Cox]

See http://www.statalist.org/forums/foru...or-xtpmg-model for a very recent thread on the same issue.

[Zakaria Zoundi]

thanks Nick. I had seen the post before posting this one. indeed I couldn't find any clear response.

[Nick Cox]

First, you should have said so. What was unclear? Try fitting a simpler model; use the difficult option; and rewrite the program so that it meets your needs were three specific suggestions.

[Zakaria Zoundi]

thanks. It was my mistake. I tried adding 'dfiicult" as follow: xtpmg D.domf D.aidgov D.inf , lr( L. domf aidgov inf ) diff
but same result : " initial values not feasible"

[Nick Cox]

OK; so fitting a simpler model and rewrite the program so that it meets your needs remain the possibilities I suggest.

[Zakaria Zoundi]

Thanks much Nick. I removed the space between D and dot (.) and deleted one outlier.