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Hi - I Would like to estimate a TAR model with 3 variables (GDP and two sets of price series). The regime is determined by one of these price series - 'positive' regime when the price change is positive, and negative otherwise (i.e. threshold is zero). Grateful for an example on how to do this seper...

I would like to estimate a VECM with 6 variables - 2 of which are stationary, and the remaining 4 are integrated of order one I(1). I would like to keep the stationary variables unchanged when they enter the model, but eviews seems to automatically difference all endogenous variables. Is there a way...