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Testing if my errors are student t distributed
Posted: Fri Sep 28, 2012 6:30 am
by strypste
Hi
I estimated my model with Maximum Likelihood assuming a student t distribution. Now I would like to test if my errors are indeed t distributed. How can I test this in Eviews?
Steven
Re: Testing if my errors are student t distributed
Posted: Fri Sep 28, 2012 7:06 am
by EViews Gareth
Open up the residual series, click on View->Descriptive Statistics->Empirical distribution tests.
Re: Testing if my errors are student t distributed
Posted: Fri Sep 28, 2012 7:22 am
by strypste
Thanks for your reply.. However, the reason for my question is that the student t distribution is not in that list...
Re: Testing if my errors are student t distributed
Posted: Fri Sep 28, 2012 8:25 am
by EViews Gareth
Ah, yes. That's what I get for answering before breakfast. You can do a Quantile-Quantile plot against the t-distribution to get an eyeball of how close the distribution is.
Re: Testing if my errors are student t distributed
Posted: Sun Sep 30, 2012 7:40 am
by strypste
Thanks!
I managed to do it manually. However, if I want to include it in a program, then my command always plots the data against the normal distribution instead of the t distribution... This is my code:
growth.qqplot theory(dist=tdist)
where growth is the series with the data.
What am I doing wrong here?
Re: Testing if my errors are student t distributed
Posted: Mon Oct 01, 2012 9:58 am
by EViews Glenn
Looks like a bug. Let me check into it.
[edit: I've put a fix into the main code base. It should show up in the next update.]