This is obviously very late in the game, but is there a difference in testing for near multicollinearity (using estat vif after -reg-) and testing for near multicollinearity after using xtreg? I can't seem to find a way to test for near multicollinearity once I've declared my data a panel (xtset) and run the regression (xtreg). Is this any difference in declaring the data a panel dataset and using reg, then estat vif as opposed to xtreg and then testing for near multicollinearity?
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