This function computes AIC, FPE, BIC, and HQ up to p = lag_max of VAR model.
Arguments
- y
- Time series data of which columns indicate the variables 
- lag_max
- Maximum Var lag to explore (default = 5) 
- include_mean
- Add constant term (Default: - TRUE) or not (- FALSE)
- parallel
- Parallel computation using - foreach::foreach()? By default,- FALSE.
