I am using the rugarch package estimate model(modifed GJR GARCH)
want to estimate the following model:
I would like to see spillover effect from US to others and change pre and post crisis but I don’t know how to do add pre and post dummy n rugarch.
Some code just put dummy in external.regressors parameter .
But, that case, they get only one coef like vxreg1
I want to compare variables before and after the global crisis.
Like this
will be very grateful if you help me to get the solution