In this note, we recollect some formulas and facts about linear mixed models in relation to Cohen’s effect size measure f2. It is shown how an estimate of the variance-covariance matrix for the estimated fixed effects parameter vector may serve to compute f2in the presence of random effects....

We investigate correlations of asset returns in stress scenarios where a common risk factor is truncated. Our analysis is performed in the class of normal variance mixture (NVM) models, which encompasses many distributions commonly used in nancial modelling. For the special cases of jointly...