Recently, there has been increasing interest in model averaging within frequentist paradigm. In the existing literature, for proving consistency of model averaging estimators, local mis-specification is assumed. In this paper, we show that under general fixed parameter setup, the model averaging...

Missing data is a common problem in economics studies. We propose using Mallows model averaging (MMA) to deal with this problem, which has an important advantage over its competitors in that it asymptotically achieves the lowest possible squared error. A simulation study in comparison with...

We propose a new semiparametric autoregressive duration (SACD) model, which incorporates the parametric and nonparametric estimators of the conditional duration in a multiplicative way. Asymptotic properties for this combined estimator are presented. The empirical application to the transaction...