Modelle zur Auswahl diskreter Alternativen (discrete choice modeis) stellen etne spezielle Situation der ökonomischen Nachfrageanalyse dar. Die verwendeten Modelle-müssen deshalb den nachfragetheoretischen Rahmen berücksichtigen. Lä3t-man für das ausgewählte Gut beliebige Mengen zu, so...

Under fairly weak conditions it is shown that an optimal portfolio choice exists and is unique. It is further shown that this choice is a continuous function of the joint distribution function of the random returns on the assets from which the choice is made.

Within the framework of a microeconomic model of leisure demand, the determinants of German tourists' decisions whether to spend vacation at all, which activities to pursue, and which travel destination to choose are investigated empirically. Three-stage nested multinomial logit models are...

The paper analyses German import sof green coffee using both descriptive statistical and econometric tools. As determinants of import demand we consider not only prices and income but also the structure of the German market of roasted coffee and two institutional arrangements which had...

An adequate stochastic model for shares as dependent variables is provided by the Dirichlet distribution. The paper considers two different parametrizations which lead to linear and nonlinear Dirichlet share equations. Using an inequality for the trigamma function the global concavity of the...