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...

A methodology is proposed for evaluating the level of service within an airportlandside system from the passenger's point of view using linguistic servicecriteria. The new concept of level of service for a transport system, particularlywithin the airports indicates that there must be strong...

During recent years, the supply chain performance management has become a key strategic consideration. Many manufacturers seek to collaborate with their suppliers and customers in order to upgrade their competitiveness and management performance. Because of complexity, uncertainty and vagueness...

Policy makers and practitioners in Afghanistan tend to favor interventions promoting high value agricultural activities, including dairy production. Given the lack of available research and data in the country, the impact of these interventions on traditional subsistence and semi-subsistence...

This literature review summarizes the knowledge in the field of the strategic management of international NGOs operating in developing countries based on the analysis of 161 books and articles published since 1980. The review yielded five major themes: 1) relationships with donors, 2)...

"This paper reviews oil palm biofuel development and analyzes social and environmental impacts of oil palm plantations in Indonesia. Three plantation study sites were selected in West Papua (Manokwari), West Kalimantan (Kubu Raya) and Papua (Boven Digoel) and used as case studies to illustrate...

Coastal tourism is the mainstay of Goa’s economy. The economic importance of Goa’s coastal tourism is unquestionable.But the main challenge of Goa’s coastal tourism is the conflict between the economic benefits tourism generates and its negative impact on the coastal environment. The...

A conservative ex-ante assessment of supply-shift gains alone (excluding social and environmental gains), shows that the investment in zero tillage (ZT) R&D by the Rice-Wheat Consortium and CIMMYT was highly beneficial with a benefit-cost ratio of 39, a net present value of US$ 94 million and an...

This paper presents an application of a two and three stages difference in differences model to measure environmental and economic impacts of Farmer Field School on crop and pest management practices of rice in Thailand. Panel data from 241 farm households were collected three times over a...

This paper presents an application of a difference in differences model to measure environmental and economic impacts of Farmer Field School on crop and pest management practices of rice in Thailand. Panel data from 241 farm households were collected three times over a period of four years in...