In this paper we follow a different approach by taking a first step towards an option valuation model which does not explicitly make use of unobservable State variables. Instead of using a stochastic variance variable directly, we assume that the variance of stock returns is determined by the...

Am Beispiel des Konjunkturmodells von Kaldor wird gezeigt, wie die Kontrolle eines chaotischen Systems mit begrenzten Resourcen auch dann noch durchgeführt werden kann, wenn es sich bei dem zu stabilisierenden Gleichgewicht nicht mehr um einen sogenannten Sattelpunkt handelt. Diese...

This paper analyzes the compatibility decision of a dominant hardware supplier. There are two substitutive variants of the hardware component of a hardware-software system, they are horizontally differentiated, and one of the two has a quality advantage. Among other things, we show under what...

Auf Anleihemärkten versuchen Investoren mit aktiven Handelsstrategien eine über der risikoadäquaten Marktverzinsung liegende Rendite zu erwirtschaften. Dabei kommen prognoseorientierte Strategien wie auch Anlagepolitiken zur Verwendung, die zeitweilige Marktungleichgewichte zu nutzen...

This paper models the competition of user networks as a continuous-time Markov process. It presents a dynamic version of the Discrete Choice Analysis with state-dependent choice probabilities. Among other things, we show that the network competition can be characterized by the coexistence of...

This paper presents theoretical models and their empirical results for the return and variance dynamics of German stocks. A factor structure is used in order to allow for a parsimonious modeling of the first two moments of returns. Dynamic factor models with GARCH dynamics (GARCH(1,1)-M,...

Problems related to labor migration on a large scale in South-North as well as in East-West direction are high on the agenda. This papers presents an endogenous growth model for two regions with human capital formation as the engine of growth. The model is used to analyze the growth (rate)...