This article proposes a new diagnostic test for dynamic count models, which is well suited for risk management. Our test proposal is of the Portmanteau-type test for lack of residual autocorrelation. Unlike previous proposals, the resulting test statistic is asymptotically pivotal when...

Regularity conditions are given for the consistency of the Poisson quasi-maximum likelihood estimator of the conditional mean parameter of a count time series. The asymptotic distribution of the estimator is studied when the parameter belongs to the interior of the parameter space and when it...

The use of equity derivatives to conceal economic ownership of shares (“hidden ownership”) is increasingly drawing attention from the financial community, as is the exercise of voting power without corresponding economic interest (“empty voting”). Market participants and commentators...

The use of equity derivatives to conceal economic ownership of shares (“hidden ownership”) is increasingly drawing attention from the financial community, as is the exercise of voting power without corresponding economic interest (“empty voting”). Market participants and commentators...