steps to time series analysis on my data Cross Validated
I wonder what should I do next, steps by steps, to fit my model? I first use log and/or difference on all the 4 variables to make them become stationary, and then run the model? to decide whether I should put 4 logs and/or difference on all the 4 variables? or on Y, X1, X2, or X3? time series methods should I use to fit my ...