Dear Emiel
This is interesting. But the logic is very clear , If there is no relationship between two variables , why we should try to establish one. 
I am not sure but cannot a factor analysis give some guidance as to reduce the concerned variables
I also think some omitted variable may do the trick
I feel these suggestions may not exacrly address the problem in hand then soory to give suggestions.
 N.K.Dashora 
Udaipur ( Rajasthan )
India
 


 
On Fri, Aug 10, 2012 at 1:28 PM, Emiel Denuwelaere <emiel.denuwelaere@gmail.com> wrote:
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@gmail.com


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