Stefanovits, David; Schubiger, Urs; Wüthrich, Mario V. - In: Risks : open access journal 2 (2014) 3, pp. 315-348
We consider a one-period portfolio optimization problem under model uncertainty. For this purpose, we introduce a measure of model risk. We derive analytical results for this measure of model risk in the mean-variance problem assuming we have observations drawn from a normal variance mixture...