Hi, 
  
 I have some quesions about about ARIMA and FARIMA:
 1) Is there a funtion in a third party package to fit ARIMA model?
 2)While using fracdiff function to fit FARIMA model, can I use AIC, BIC rule to select the best fit model. For example, to select the best model between nar=0 and nar=1 which used in fracdiff.
 3)While using fracdiff to fit FARIMA model, how to forcast furture values of a FARIMA series? Could anyone give me an example?
 4)Is there a function to get the Hurst parameter of a time series?
  
 Your help is very much appreciated!
  
 Sara
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