Die traditionell betriebene Konjunkturtheorie versucht aggregierte Schwankungen der wirtschaftlichen Aktivität unter der Prämisse vollkommener Kapitalmärkte zu erklären. Die Rolle von Kapitalmarktunvollkommenheiten bleibt in solchen Modellen unberücksichtigt. An diesem Theoriedefizit setzt...

Capital market imperfections cause a relevance of a project's contribution to the firm's total risk, e.g. because of costs of financial distress. Based on this observation Stulz (1999) argues that modern capital budgeting leads to an inappropriate assentment of the value of a project since only...

The paper studies the problem of maximizing the expected utility of terminal wealth in the framework of a general incomplete semimartingale model of a financial market. We show that the necessary and sufficient condition on a utility function for the validity of several key assertions of the...

Diese Arbeit stellt eine Monographie zur Eindeutigkeit von Wettbewerbsgleichgewichten in zweiperiodigen Finanzmarktmodellen, in Finanzmarktmodellen in endogener Unsicherheit (Sunspot-Modelle) sowie in dynamischen Finanzmarktmodellen mit der Struktur überlappender Generationen (OLG-Modelle) dar....

One of the most enduring questions in finance is the persistence of investment risk across time. Traditional finance lacks of recipes on how to approach and how to hedge non-diversifiable risks. Risks that can not be diversified at a given point in time can nevertheless be averaged over time...

This paper presents results on the convergence for hedging strategies in the setting of incomplete financial markets. We examine the convergence of the so-called locally risk-minimizing strategy. It is proved that such a choice for the trading strategy, when perfect hedging of contingent claims...

In this paper we analyze the long-run dynamics of the market selection process among simple trading strategies in an incomplete asset market with endogenous prices. We identify a unique surviving financial trading strategy. Investors following this strategy asymptotically gather total market...

The paper analyzes the process of market selection of investment strategies in an incomplete market of short-lived assets. In the model under study, asset payos depend on exogenous random factors. Market participants use dynamic investment strategies taking account of available information about...