Hi,
I am trying to get the same picture as it is in Gujarati's book (Econometrics by Example, 1st edition), page 274.
I am using the datafile 13.6, I generate first difference of the lnclose (as instructed in the text) and I estimate this equation:
dlclose c ar(4) ar(22) ma(4) ma(22)
and get these results.
The text says that once we have a fitted model (I assume the one above), we go forecasting. Hitting the forecast buttom. And now I have a problem, bacause the textbook's text says that eviews will automaticall use the level of the log prices...But in my example it uses the first difference and I don't the picture in the book, because I get the first difference forecast.
The book's image:
What I get:
So what do I do wrong, and how can I get what is in the book (lnclose arima forecast).
Thanks.
forecasting ARIMA
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forecasting ARIMA
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- Non-normality and collinearity are NOT problems!
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Re: forecasting ARIMA
you may want to use d(lclose) rather than dlclose.
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Re: forecasting ARIMA
I first genererate lclose with GEN lclose=log(close)
and then i generate dlclose=d(lclose)
The program doesn't allow me to generate series called d(lclose)....that is the problem, because I can't write d(lclose)=d(lclose)
and then i generate dlclose=d(lclose)
The program doesn't allow me to generate series called d(lclose)....that is the problem, because I can't write d(lclose)=d(lclose)
-
- Non-normality and collinearity are NOT problems!
- Posts: 3775
- Joined: Wed Sep 17, 2008 2:25 pm
Re: forecasting ARIMA
just
ls d(lclose) c x etc
ls d(lclose) c x etc
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- Posts: 11
- Joined: Wed Jan 25, 2017 9:59 am
Re: forecasting ARIMA
thanks...did it...didn't know that function..thought I first needed to generate series....
I got what I needed, thanks.
I got what I needed, thanks.
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