Stepan is a Visiting Senior Lecturer of Statistics. The main purpose of his current research is to make a series of theoretical and practical contributions in three major directions. The first direction deals with the theory of the (singular) Wishart random matrix and its applications in statistics and econometrics. The second direction deals with the mathematical and statistical analysis of optimal portfolio weights and their risk measures from the Bayesian perspective as well as from the frequentist point of view. The third direction aims at developing and extending Bayesian VAR models and their applications in macro and financial economics.
Link to the external research page