The iid property of the model’s residuals is a crucial criterion for assessing the fit of the model to the data. GARCH-class models are the most commonly used nonlinear models in financial econometrics. In this paper various uni- and multivariate GARCH-class models were applied to selected...

A model of the short-term power system load forecasting based on fuzzy clustering is presented. It can be classified as similarity-based models relying on the assumption that if patterns of the time series sequences are similar, then the forecast patterns associated with them are also similar....

Construction, estimation and application of the mutual information measure have been presented in this paper. The simulations have been carried out to verify its usefulness to detect nonlinear serial dependencies. Moreover, the mutual information measure has been applied to the indices and the...

The paper deals with an analysis of factors influencing the acceptance of the seven major payment methods (i.e. cash on delivery, bank transfer, online payment integrator, payment in person, pay-by-link, card payment and virtual payment provider) by the Polish online shops. Our research was...

An evaluation of the efficiency of different methods of the minimum variance portfolio selection was performed for seventy stocks from the Warsaw Stock Exchange. Eight specifications of multivariate GARCH models and six other methods were used. The application of all considered GARCH-class...