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RE: st: Using Bayesian Information Criterion (BIC)

From   "Lorena Barberia" <>
To   <>
Subject   RE: st: Using Bayesian Information Criterion (BIC)
Date   Tue, 22 Apr 2008 13:55:32 -0300

I have a similar question. I would like to use the BIC to compare different
estimations. Specifically, I am trying to estimate models with panel
corrected standard errors (XTPCSE) and GMM First Difference and System
estimators. After both commands, I tried to issue the command estat ic. I
receive the following error message "likelihood information not found in
last estimation results." 

I tried to follow Rodrigo's instructions below, but I am not able to receive
the BIC for each model. I am not sure what I am doing wrong, but I could not
get the result.

Thanks for any help anyone can offer,


-----Original Message-----
[] On Behalf Of Rodrigo Alfaro A.
Sent: Monday, April 21, 2008 4:11 PM
Cc: Beat Hintermann
Subject: RE: st: Using Bayesian Information Criterion (BIC)

Type after your reg

local bic = -2*e(ll) + log(e(N)) * (e(N) - e(df_r)) 


gen double newvar = -2*e(ll) + log(e(N)) * (e(N) - e(df_r)) 

* Example
sysuse auto
reg price mpg  headroom trunk
di -2*e(ll) + log(e(N)) * (e(N) - e(df_r))
estat ic


-----Mensaje original-----
[] En nombre de Jeph Herrin
Enviado el: Lunes, 21 de Abril de 2008 02:48 p.m.
Asunto: Re: st: Using Bayesian Information Criterion (BIC)

  estat ic
  matrix S=r(S)
  gen BIC=S[1,6]

Creates the variable you want.


Beat Hintermann wrote:
> Hi there
> I know how to display the BIC by typing estat(ic), but I can't seem to

> figure out how to use it in a calculation.
> For example, I'd like to create a variable that takes the value of the

> BIC of the last regression. gen newvar=e(BIC) or something along those

> lines does not seem to work. Can anyone help?
> Beat
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