Mammen, Enno; Linton, Oliver B. - 2004
We investigate a class of semiparametric ARCH(infinity) models that includes as a special case the partially … nonparametric (PNP) model introduced by Engle and Ng (1993) and which allows for both flexible dynamics and flexible function form … pointwise distribution of the nonparametric component of the model. We also discuss efficiency of both the parametric and …