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### Insufficient numbers of observations and White Test

Posted: Sat May 14, 2011 3:58 pm
Dear all,

I've got this regression function:

xb – xa = α + β1*Di + β2*xb +εi

Where Di is a dummy variable and xb attempts to solve mean regression.
I'm using 29 observations.

When I try to perform a White test using Eviews 7 I get the message: Insufficient number of observations, I'm getting the following message "insufficient number of observations". I've tried to increase the number of observations using 50 but it didn't work.
Any ideas of what the problem might be?

PS (Question 1!)

### Re: Insufficient numbers of observations and White Test

Posted: Sat May 14, 2011 4:40 pm
Could you post the workfile?

### Re: Insufficient numbers of observations and White Test

Posted: Sun Sep 01, 2013 3:37 am
Hi Gareth,

I am trying to run the following regression. It has two dummy variables apart from 5 time series. I am working on a data set containing 3000 observations.

y c y(-1) y1(-1) d1*y1(-1) d2*y1(-1) y2(-1) d1*y2(-1) d2*y2(-1) y3(-1) d1*y3(-1) d2*y3(-1) y4(-1) d1*y4(-1) d2*y4(-1)

However, I am getting the message "Insufficient number of observations". The workfile is attached herewith.

Thank you so much.

Warm Regards
Priyanshi

### Re: Insufficient numbers of observations and White Test

Posted: Sun Sep 01, 2013 6:42 am
You appear to have included this same variable more than once.

### Re: Insufficient numbers of observations and White Test

Posted: Sun Sep 01, 2013 7:44 pm
Dear Startz,

I re-checked the equation. However, I couldn't detect the error in the equation. Is 3000 an insufficient number of observations for running this equation? I referred to an academic paper and the author has successfully estimated this model for 752 observations.

I am currently using Eviews 7.

Thank you.

Warm Regards
Priyanshi

### Re: Insufficient numbers of observations and White Test

Posted: Sun Sep 01, 2013 7:55 pm
I copy and pasted your equation specification and it estimated just fine. Make sure your copy of EViews 7 is fully up to date (Help->EViews Update)

### Re: Insufficient numbers of observations and White Test

Posted: Sun Sep 01, 2013 8:28 pm