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This paper employs Greenberg'sTheory of Social Situations to explain the variation of sharecropping contracts across economies as a function of social norms that satisfy von Neumann-Morgenstern stability. We demonstrate that equal division and core outcomes are jointly possible when bargaining is unrestricted. By contrast, when the landlord acts as a monopsonist, core outcomes are the only possible social norm. In addition, if the presence of an outside wage is recognized, core and equal division norms may coincide.  相似文献   
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This paper traces the development of geographical interest in tourism during the past half century and examines the range and scope of the geography of tourism. The available literature is reviewed and suggestions are made regarding possible research aveneus and theoretical developments. Six major areas of interest are identified: spatial aspects of supply, spatial aspects of demand, the geography of resorts, patterns of movements and flows, the impact of tourism, and models of tourist space. Through an emphasis on spatial interaction an attempt is made to provide some cohesion and synthesis for this body of knowledge which constitutes the basis of the geography of tourism.  相似文献   
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Literature on tourism in tropical Africa is reviewed to indicate the current and future roles of tourism in tropical African countries. Attention is then directed to research issues whose investigation may lead to the development of guidelines for the extension, regulation, and management of tourism. These issues are arranged under the following headings: inventory, demand, types of tourism, economic impacts, socio-cultural impacts, environmental impacts, infrastructure, regional patterns, international cooperation, and tourism futures.  相似文献   
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Research on tourism and regional development should include a temporal perspective, for studies of contemporary and economic impact are, by themselves, insufficient to explain tourism's contribution to regional development. Such a genetic approach is used to examine the growth and impact of tourism in Queenstown, New Zealand. Events and interrelationships are examined over the last twenty-five years to show the process of growth, changes in the patterns of local and outside involvement and the increasing sophistication of a resort once based largely on scenic factors alone. Certain sectors of the industry have been developed primarily by individuals and companies from the local region, while others have been dominated by outsiders. Although the former contribute the most to regional development through local participation in the development process, external developments have also generated complementary growth. A consideration of events over a certain time span allows these different factors to be placed more clearly in the context of regional development.  相似文献   
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