## forecasting the level variable

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lfcburc
Posts: 5
Joined: Tue Nov 16, 2010 4:40 am

### forecasting the level variable

hi everyone..here is my question

i work with some seasonal time series..(i must mention i am very new to the econometrics)..i take logarithm of series firstly,first level difference then,and seasonal difference ..so my series 'export' becomes 'D12DLNEXPORT'..

when i try to forecast ,i just want to predict the level variable: 'export' ,not the latest form(D12DLNEXPORT)..

lfcburc
Posts: 5
Joined: Tue Nov 16, 2010 4:40 am

### Re: forecasting the level variable

startz
Non-normality and collinearity are NOT problems!
Posts: 3517
Joined: Wed Sep 17, 2008 2:25 pm

### Re: forecasting the level variable

If you are forecasting from an equation, make the left hand side variable dlog(export) and EViews will offer to forecast the level. I'm not sure how to handle the seasonal part.

lfcburc
Posts: 5
Joined: Tue Nov 16, 2010 4:40 am

### Re: forecasting the level variable

ok thanks..but its the seasonal part that actually causes trouble..

i think it can be something like that.. dlog(export,1,12) or dlog(export,0,12)

does these look possible? any idea?

lfcburc
Posts: 5
Joined: Tue Nov 16, 2010 4:40 am

### Re: forecasting the level variable

EViews Gareth
Fe ddaethom, fe welon, fe amcangyfrifon
Posts: 12371
Joined: Tue Sep 16, 2008 5:38 pm

### Re: forecasting the level variable

You answered your own question. The DLOG function calculates log-difference, and it has arguments for both the difference order and the seasonal difference order.

lfcburc
Posts: 5
Joined: Tue Nov 16, 2010 4:40 am

### Re: forecasting the level variable

thanks..

AntonioAcha
Posts: 21
Joined: Wed Jan 07, 2015 8:49 am

### Re: forecasting the level variable

Can someone post the code to forecast the series in levels pls