How do I perform VIF test after xtreg

[Adamu Jibrilla]

Dear Experts, I have run the following
xtreg xtreg x fdi l k m lc, fe vce(robust)
Is there need to perform VIF test? if yes, how, please? Thank you.

[Madu Abuchi]

You can use -collin- command to assess VIF of your predictors

ssc install collin
help collin

clear
use http://www.stata-press.com/data/r15/nlswork.dta
xtset idcode
xtreg age race msp grade
collin race age msp grade

[Adamu Jibrilla]

Thank you, Madu.