Emiel
As far as I know, you can run a regression with regressors that are
originally of different integration orders, provided you first
difference the I(1) variables, so that your regressions contains only
I(0) variables. This is done and advocated for example (although
slightly different method) in Juselius book on cointegrated VAR, where
some variables are kept I(0).
Best
Matthieu
Le 10/08/2012 09:58, Emiel Denuwelaere a écrit :
Hello,
For my school these, i am doing research to investigate the effect of
different variables on the reserve currency shares of different
currencies. Before i am working with panel data, i liked to make an
OLS estimation on the dollar. So i'm using time series data. I checked
the variables for stationarity using the ADF-test, and it seems that
the dependent variable is non-stationary along with two explanatory
variables. The other 4 explanatory variables are stationary. Since you
cannot run regressions with variables of a different integration, i am
not sure how to proceed.. I suggest it is not appropriate to just take
the first differences of the non-stationary variables?
Any help on this topic would be very much appreciated. Thanks in advance.
For additional info on the data/research, please do not hesitate to
contact me.
--
Met vriendelijke groeten,
Emiel Denuwelaere
M: +32 (0)476 56 08 75
E: emiel.denuwelaere(a)gmail.com <mailto:emiel.denuwelaere@gmail.com>
_______________________________________________
Gretl-users mailing list
Gretl-users(a)lists.wfu.edu
http://lists.wfu.edu/mailman/listinfo/gretl-users