We propose exible models for multivariate realized volatility dynamics which involve generalizations of the Box-Cox transform to the matrix case. The matrix Box-Cox model of realized covariances (MBC-RCov) is based on transformations of the covariance matrix eigenvalues, while for the Box-Cox...

We study the association of Web-based non-financial disclosure and a firm's cost of finance within an international context (North America and continental Europe). We examine voluntary Web placement of non-financial disclosures using an information index covering a firm's value creation process....