This paper considers a class of parametric models with nonparametric autoregressive errors. A new test is proposed and studied to deal with the parametric specification of the nonparametric autoregressive errors with either stationarity or nonstationarity. Such a test procedure can initially...

Varianzquotiententests gehören mittlerweile zum "State of the Art" der empirischen Untersuchung von Aktienkursen auf Random Walk Verhalten. Dieser Artikel gibt einen kompakten Überblicküber diese Verfahren und geht insbesondere auch auf aktuelle Bootstrap-Entwicklungen auf diesem Gebiet ein....

The study reports empirical evidence that artificial neural network based models are applicable to forecasting of stock market returns. The Nigerian stock market logarithmic returns time series was tested for the presence of memory using the Hurst coefficient before the models were trained. The...