Re: [Gretl-users] Discrepancy in autocorrelation tests?

2011-10-13 Thread Ignacio Diaz-Emparanza
El 12/10/11 05:37, Muheed Jamaldeen escribió: > Thanks for that Allin. > > > [...] > While we're on the subject, is there a script for a portmanteau test for > auto correlation? We have the Ljung-Box Q statistic and p-value in the text window of the correlogram command 'corrgm'. -- Ignacio

Re: [Gretl-users] Discrepancy in autocorrelation tests?

2011-10-13 Thread Allin Cottrell
On Thu, 13 Oct 2011, Ignacio Diaz-Emparanza wrote: > El 12/10/11 05:37, Muheed Jamaldeen escribió: >> Thanks for that Allin. >> >> >> [...] >> While we're on the subject, is there a script for a portmanteau test for >> auto correlation? > > We have the Ljung-Box Q statistic and p-value in the

Re: [Gretl-users] Discrepancy in autocorrelation tests?

2011-10-12 Thread Muheed Jamaldeen
Thanks for that Allin. I thought I'd clarify the point regarding the autocorrelation test which was unclear in my previous email. The sample period 1985:01 to 2009:04 is chosen for specific reasons relating to stability and floating of the exchange rate. If the autocorrelation test (automatic)

[Gretl-users] Discrepancy in autocorrelation tests?

2011-10-12 Thread Muheed Jamaldeen
Hi all, I've been using the modtest --autocorr option to test for autocorrelation in a VAR model. I set the sample 1985 01 - 2009 04 (100 observations). The automatic test and the manually specified LM test calculation do not yield the same result because the former (automatic) uses observations

Re: [Gretl-users] Discrepancy in autocorrelation tests?

2011-10-12 Thread Sven Schreiber
Am 12.10.2011 05:37, schrieb Muheed Jamaldeen: > > And using the var option in Gretl what's the best way to specify > heterogeneous (in variables) equation structure? (e.g. to impose block > exogeniety for a small open economy VAR) > > eg. > Y = Y-1 + X-1 + Z-1 > X= X-1 + Z-1 > Z=X-1 + Z-1 >

Re: [Gretl-users] Discrepancy in autocorrelation tests?

2011-10-12 Thread Allin Cottrell
On Wed, 12 Oct 2011, Muheed Jamaldeen wrote: > I've been using the modtest --autocorr option to test for > autocorrelation in a VAR model. I set the sample 1985 01 - 2009 04 > (100 observations). The automatic test and the manually specified > LM test calculation do not yield the same result