Porque al realizar un analisis de redundancia de variables en un modelo ARCH me arroja el error "positive or non-negative argument to function expected"? Cuales pueden ser las causas?
Como se realizan los pronosticos con modelos ARCH? Cuales son los pasos a seguir en caso de obtener el error NA?
Because when you perform an analysis of redundant variables in an ARCH model throws me the error "non-positive or negative argument to function expected"? What can be the causes?
As the predictions are made with ARCH models? What are the steps to take if you get the error NA?
Thanks for the help.
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