It sounds like you need to estimate a system, not a single equation. It also sounds like your question  may be more methodological than gretl related. As such, it may be better to talk off list. (gretl developers: PLEASE correct me if I am wrong).

 

I think the problem is that gretl cannot create from nothing future observation of your explanatory variables (no package can). Thus, if you do not yet know them, you need to forecast them as well. Thus you need to estimate a system, a var for example. I would use the var command then in the model output window choose forecast the variable you are interested in. If you have more methodology questions, please feel free to reply to my email.

 

Logan

 

From: gretl-users-bounces@lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] On Behalf Of Ondrej Dvouletý
Sent: Saturday, April 26, 2014 2:56 PM
To: gretl-users@lists.wfu.edu
Subject: [Gretl-users] Problems with regression model forecast into future with 2 or 3 observations (T+1, T+2, T+3)

 

Dear All,

 

I would like to ask you for help with Gretl software. I am writing you with an problem which I face during making forecast / prediction. I estimated econometric model with one depended variable and four explanatory variables. Method of estimating was OLS or Cochrane - Orcutt (both with same result). When I try to make a forecast into the future (and Yes, I added new observations into the new data set) I am unable to forecast into the future.

 

Gretl notices: There are no observations available for forecasting out of sample.  If you wish, you can add observations (Data menu, Edit data), or you can shorten the sample range over which the model is estimated (Sample menu).

 

The problem is that I have vacant places for forecast but the Gretl does not make it. When I put into the empty places any values (without sense for example 1, 2...) The forecast is made. 

 

Do you have any procedure how to fix the problem? I tried this several times and there was no way how to do that. How can I make forecast without entering nonsense values just when I add new empty observations and I want to know forecasted values.

 

Thank you very much for your reply.

 

Ondrej Dvoulety

 

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