squared variable as dummy

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loststudent11
Posts: 3
Joined: Mon May 02, 2011 2:41 am

squared variable as dummy

Postby loststudent11 » Mon May 02, 2011 2:59 am

Hi!
Thanks in advance for any help..
I have a regression which looks like Y c X (X-squared)k . k is a dummy variable for data within a specific time range. So I have one independent for most of my series, and for the rest I have that same independnet and that independent squared. I hope thats clear. Anyway when I regress it i get the "near singular matrix" error....
Any advice greatly appreciated.

L
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startz
Non-normality and collinearity are NOT problems!
Posts: 3797
Joined: Wed Sep 17, 2008 2:25 pm

Re: squared variable as dummy

Postby startz » Mon May 02, 2011 6:56 am

Take a look at k*x^2 and see if it turns out to be what you want. Odds are you have a sample error or a typo.
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loststudent11
Posts: 3
Joined: Mon May 02, 2011 2:41 am

Re: squared variable as dummy

Postby loststudent11 » Tue May 10, 2011 1:31 am

I tried everyhting, finally settled on a completely differnt model. Thanks though!
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