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Re: Variance Inflation Factor [message #11704 is a reply to message #11698]

Tue, 31 January 2017 17:16

Bridgette-DHS
Messages: 3230
Registered: February 2013

Senior Member

Following is a response from Senior DHS Stata Specialist, Tom Pullum:

Sorry, but this question is not about DHS data or even about Stata. I am not familiar with this procedure and don't know what it does.

I do notice that your logit regression seems to treat all variables as interval-level, whereas most of them are categorical and should be preceded by "i.". And if they are all categorical, you will have at least 2^9=512 combinations. You will have many combinations that are empty for one or both categories of the outcome and the regression will be unstable. The solution for this is to use fewer variables on the right hand side of the equation.

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[Message index]

		Variance Inflation Factor By: nwegbus on Mon, 30 January 2017 19:21
		Re: Variance Inflation Factor By: Bridgette-DHS on Tue, 31 January 2017 17:16
		Re: Variance Inflation Factor By: nwegbus on Fri, 03 February 2017 03:24
		Re: Variance Inflation Factor By: Bridgette-DHS on Fri, 03 February 2017 09:27
		Re: Variance Inflation Factor By: nwegbus on Fri, 03 February 2017 10:23
		Re: Variance Inflation Factor By: bakerchowdhury on Thu, 13 April 2017 15:25
		Re: Variance Inflation Factor By: Bridgette-DHS on Fri, 14 April 2017 07:46
		Re: Variance Inflation Factor By: AnvitaDixit on Wed, 28 June 2017 14:03

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