In der vorliegenden Arbeit werden Modelle für die Portfolio-Optimierung analysiert und implementieren. Dabei stehen quantitative Methoden der Fuzzy-Logik im Vordergrund. Zunächst wird das klassische Portfolio-Modell nach Markowitz dargestellt und dessen Resultate für einen Vergleich mit einem...

Kern der vorliegenden Arbeit ist die Entwicklung eines Black-Litterman-Modells zur Allokation von Immobilienportfolios. Motiviert durch die global zunehmende Bedeutung des Immobilien-Portfoliomanagements und die begrenzte Eignung der Markowitz?schen Portfolio-Selektionstheorie in der Praxis wird...

This paper estimates the fishing costs and the returns to fishing for nine commercial salmon fleets in Alaska. The econometric model uses a two-stage least squares estimation procedure to estimate the effect of congestion and heterogeneity on the returns to fishermen. The hypotheses that...

Inappropriate diets have been found to cause long-term health problems in most industrial and post-industrial countries worldwide. Despite the existence of dietary guidelines in many countries – and widespread familiarity with these guidelines – large shares of the populations donot comply...

The paper proposes developing a trade model for salmon to assist in discussions and negotiations of current international salmon trade issues and major risk problems facing the salmon industry. Two modeling approaches are discussed: 1) developing a traditional equilibrium trade programming model...

This paper analyses the evolution of agriculture’s participationin the US gross domestic product (GDP) from 1960 to 2001. Aneconometric model is run in order to identify the main variables thatdetermine this participation. From 1960 to 2001, there is a downwardtrend of agriculture’s...

The study measures farm credit risk by using farm records collected by Farm Business Farm Management (FBFM) during the period 1995-2004. The study addresses the following questions: 1) whether farm’s financial position is fully described by the structure model, 2) what are the determinants of...

Local bus services in Britain (excluding London) were deregulated in October 1986. Bus vehicle kilometres increased after deregulation, but passenger journeys fell and bus fares increased in real terms. The inability to reverse the long-run decline in passenger journeys and the increase in bus...