# How could I use VAR model for nonstationary series?

I have five independent variables: oil (stationary at level), f (stationary at level), k (stationary after differencing twice) , pd (stationary after differencing), m (stationary after differencing) and dependent variable rc (stationary at level). How could use or write the model on Eviews? Are my inputs displayed in the graph below correct? And could I use vecm?

• You should add more information about what you are trying to achieve with your model. Then it may be possible to give a better answer that the one I gave below. – mpiktas Dec 9 '14 at 12:14

• You use VAR when there is more than one endogenous (dependent) variable among the variables you have. VAR allows for mutual dependence, e.g. when $rc$ depends on (lagged) $oil$ and $oil$ depends on (lagged) $rc$. There are as many equations in a VAR as there are dependent variables. If only one variable is endogenous and all the other are exogenous (independent), then your VAR will only have one equation and thus will no longer be a VAR but rather a simple regression. – Richard Hardy Dec 10 '14 at 1:50