Professor of Energy Systems, Yale University

University of Erlangen-Nuremberg

Professor of Empirical Economic Research, University of Kassel

Professor of Empirical Economics, Erasmus University Rotterdam

Professor of Econometrics, Monash University

Universität Osnabrück, Institut für Empirische Wirtschaftsforschung

Faculty of Economics and Business, Universiti Malaysia Sarawak

Leibniz Universität Hannover

Universidad Espíritu Santo, Ecuador

professor of Microeconomics, University of Groningen