Theußl, Stefan and Schwendinger, Florian and Hornik, Kurt (2017) ROI: The R Optimization Infrastructure Package. Research Report Series / Department of Statistics and Mathematics, 133. WU Vienna University of Economics and Business, Vienna.
Hirk, Rainer and Hornik, Kurt and Vana Gür, Laura (2017) Multivariate Ordinal Regression Models: An Analysis of Corporate Credit Ratings. Research Report Series / Department of Statistics and Mathematics, 132. WU Vienna University of Economics and Business, Vienna.
Philipp, Michel and Rusch, Thomas and Hornik, Kurt and Strobl, Carolin (2017) Measuring the Stability of Results from Supervised Statistical Learning. Research Report Series / Department of Statistics and Mathematics, 131. WU Vienna University of Economics and Business, Vienna.