Granger test in cointegrated VAR
Posted: Thu Feb 12, 2009 1:24 am
Hi
I'm now estimating VAR with cointegrated variables, variables of I(1). Some other studies use differenced variables, I(0), to the Granger causality test in VAR even if the variables are cointegrated. Is it OK? I fear that the long term relation of the variables are not to be constructed by differenced variables, so that Granger causality cannot be interpreted.
Sincerely
I'm now estimating VAR with cointegrated variables, variables of I(1). Some other studies use differenced variables, I(0), to the Granger causality test in VAR even if the variables are cointegrated. Is it OK? I fear that the long term relation of the variables are not to be constructed by differenced variables, so that Granger causality cannot be interpreted.
Sincerely