Dear Jack<br><br>You are right. I just tried in console:<br>&nbsp; garch 0 1; Y const Y(-1) --verbose<br>
and I got the same results as what I had in default menu function. <br>Thanks<br><br>Yi-Nung Yang<br><br><br><div class="gmail_quote">2008/5/21 Riccardo (Jack) Lucchetti &lt;<a href="mailto:r.lucchetti@univpm.it">r.lucchetti@univpm.it</a>&gt;:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Wed, 21 May 2008, yinung CYCU wrote:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dear all<br>
<br>
<br>
I use gretl 1.7.4 to estimate a GARCH model by using default menu function (i.e., \Model\Time series\GARCH ) and by the command in console. But they generate different results. The details of iterations are as follows. Any idea?<br>

</blockquote>
<br></div>
Could you please check what happens by issuing the command<br>
<br>
 &nbsp;garch 0 1; Y const Y(-1) --verbose<br>
<br>
via the console? If my guess is right, you should get the same estimates as the menu function. The trick is: you must specify the constant among the regressors for the mean equation. We don&#39;t support garch models withut a constant term yet. If you don&#39;t put the constant in, we should flag an error, which we don&#39;t.<br>

<br>
<br>
Riccardo (Jack) Lucchetti<br>
Dipartimento di Economia<br>
Università Politecnica delle Marche<br>
<br>
<a href="mailto:r.lucchetti@univpm.it" target="_blank">r.lucchetti@univpm.it</a><br>
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