The evaluation of the likelihood function of the stochastic conditional duration (SCD) model requires to compute an integral that has the dimension of the sample size. ML estimation based on the efficient importance sampling (EIS) method is developed for computing this integral and compared with...

We consider the estimation of a large number of GARCH models, of the order of several hundreds. Our interest lies in the identification of common structures in the volatility dynamics of the univariate time series. To do so, we classify the series in an unknown number of clusters. Within a...

I. The Statistical Model -- 1.1 Notation -- 1.2 Interpretation -- 1.3 Likelihood function -- II. Bayesian Inference: The Extended Natural-Conjugate Approach -- II.1 Two reformulations of the likelihood function -- II.2 The extended natural-conjugate prior density -- II.3 Posterior densities --...