We propose a novel approach to model serially dependent positive-valued variables which realize a non-trivial proportion of zero outcomes. This is a typical phenomenon in financial time series observed at high frequencies, such as cumulated trading volumes. We introduce a flexible point-mass...

In this article we introduce the concept of excess volume durations, which are defined as the time until a given amount of buy or sell excess volume is traded on the market. Excess volume durations indicate the one-sided intensity of liquidity demand and characterize the risk of a market maker...

In this article, we introduce the so-called stochastic conditional intensity (SCI) model by extending Russell's (1999) autoregressive conditional intensity (ACI) model by a latent common dynamic factor that jointly drives the individual intensity components. We show by simulations that the...