Conducting Panel Regressions with Region specific Dummies

[Lasse Steffens]

Hello everyone!

This is my first post here so I hope to follow the proper netiquette here.

I'm currently trying to run a panel regression on Stata/SE 17.0 and am running into some problems. My goal is to estimate the influence innovation variables on the GDP of countries. I want to group 38 countries into three different regions {1,2,3} and want to conduct a panel regression along these regions. When I use the following code:

xtset regionID yearID

I get the response:

repeated time values within panel

I understand what the problem is but I am not sure how to circumvent it. Do you have an idea?

Kind regards

Lasse Steffens

[Carlo Lazzaro]

Lasse:
welcome to this forum.
If you do not plan to use time-series operators, you can simply -xtser- your dataset with -panelid- only:

xtset regionID

[Lasse Steffens]

Lasse:
welcome to this forum.
If you do not plan to use time-series operators, you can simply -xtser- your dataset with -panelid- only:

xtset regionID

Thank you very much, Carlo!

[Maxence Morlet]

In addition to Carlo's great advice, try running this:

duplicates report regionID time
duplicates list regionID time
duplicates tag regionID time, gen(isdup) 
edit if isdup 
drop if isdup==1
drop isdup