Regression

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Netti
Posts: 2
Joined: Wed Mar 30, 2011 3:06 pm

Regression

Postby Netti » Wed Mar 30, 2011 3:22 pm

Hi all guys, I'm new here! :D :D

I have a question for you:
Image

Now, the correct answers are: b,c,d,f
The problem is that I do not understand why... :cry:

I know that B=(X ' X)^-1X ' Y
In both models (X ' X)^-1X ' will be equal, however the Y vector containing the dependent variables will change.. The only thing I understand is that the intercept parameter will be the same.
If someone can help me with that I would really appreciate it! Also, if you happen to know a book or website where these things are explained please tell me!
Last edited by Netti on Tue Apr 05, 2011 3:44 am, edited 1 time in total.

Netti
Posts: 2
Joined: Wed Mar 30, 2011 3:06 pm

Re: Regression

Postby Netti » Wed Mar 30, 2011 5:16 pm

ahah I'm so stupid! when brushing my teeth I came up with the solution!
The only parameter that changes is the one on y(t-1) simply because the second regression implies subtracting y(t-1) from both sides and thus Gamma4 will be equal to Beta4-1.
Nothing changes to the other parameters...


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