The aim of this work is to establish a mathematically precise framework for studying games of capital accumulation under uncertainty. Such games arise as a natural extension from different perspectives that all lead to singular control exercised by the agents, which induces some essential...

This thesis contains four essays which are all from the broader field of insurance economics. The chapters can be read independently, although there is a certain connection between the articles. Chapter 2, which deals with moral hazard, and chapter 3, which is on oligopolistic models in the...

Diese Doktorarbeit besteht aus vier eigenständigen Forschungsarbeiten, die in der Zeit von Oktober 2004 bis Oktober 2007 geschrieben wurden, während ich Teilnehmer am "Doctoral Programme in Quantitative Economics and Finance" an der Universität Konstanz war. Meine Forschungsinteressen...

Die Gründung des GATT Abkommens im Jahr 1947 sowie die Welthandelsorganisation führten zu weltweiten Zollsenkung. Seit deren Gründung haben sich mehr als 150 Länder innerhalb von acht Verhandlungsrunden auf Zollsenkungen von durchschnittlich 40% auf nunmehr 4% geeinigt.Hauptsäule der WTO...

The importance of social and economic networks has meanwhile been widely acknowledged throughout social sciences. Network positions are supposed to be important for both, consumers and suppliers. Examples are R&D collaborations, strategic alliances, knowledge management within organizations,...

This dissertation examines two problems that may arise in matching problems.The first two chapters deal with auctions for multiple units where bidders exhibitexternalities. The third chapter links risk aversion and information to unraveling inlabor markets.Auctions can lead to efficient...

Since Hotelling's (1929) seminal work, economists have tried to understand how product differentiation affects price competition. I study the product location decisions, on a vertical characteristic space, of two sets of horizontal competitors when the inputs supplied by the "upstream" set (the...