Here, I have collected some talks of general interest that I have given in the past years.

- Total smart und auch noch reich - hohe Mathematik in der Wirtschaft

A talk in German given in the Year of Mathematics 2008. It explains Mathematical Finance to a general audience. It also contains some words on our consulting of Vodafone during a German frequency auction. - Mathematics and Economics

contains an overview of my own work; this talk was given to a Mathematics audience when I was appointed member of the Mathematics Department at Bielefeld University - Knightian Uncertainty in Economics and Finance

explains the use and the need to cope with model uncertainty and ambiguity in the social sciences - Schuld und Chance: Wissenschaft, Banken und Politik in
der Krise

A public lecture ("Öffentlicher Vortrag des Instituts für Mathematische Wirtschaftsforschung") on the role of science, banks, and politics during the crisis given in January 2012 at Bielefeld University - Are we Guilty?

Lecture on the Role of Financial Mathematics in the Crisis at the Opening of the Bielefeld Graduate School of Theoretical Sciences 2013