Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: RE: GARCH(1,1), negative values for variance


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: RE: GARCH(1,1), negative values for variance
Date   Wed, 20 Jan 2010 20:23:17 -0000

Broadly, results like that indicate that the model you specified is
straining really hard to fit your data. 

Nick 
[email protected] 

Kamyar Baradaran


I am using the following commands:
arch var1 var2 var3, arch(1) garch(1)
predict var_variance, variance

but in the predicted values, there are some negative numbers. How
could variance be negative?


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index