A modification of multivariate t-distribution with vector of degrees of freedom is suggested: multivariate t-distribution with vector of skewness parameters and vector of degrees of freedom is introduced. A special case of this distribution is already known multivariate skew t-distribution with...

A new likelihood approach is proposed for the problem of semiparametric estimation of a conditional distribution or density under censoring. Consistency and asymptotic normality for two versions of the maximum likelihood estimator of the parameter vector in the single index model are proved. The...

In this note we analyze the composition of an optimal portfolio by considering the cumulative conditional expected outcome of two dependent assets. We develop a conditional stochastic dominance relation and show that for any concave von Neumann-Morgenstern utility function, the proportion of...