Doctoral Dissertation in Sociology

该项目扩展并测试了组织增长和衰退的数学模型。主要的焦点是解释为什么会发展出这么多不同类型的组织。影响因素包括人口密度、环境稳定性、市场集中度和生态位宽度。组织周围的边界和组织内部和组织之间的社会网络是影响社会结构变化的两个主要因素。有待开发和测试的模型展示了边界的变化如何影响社区中组织的数量和多样性，以及组织群体之间的相互作用如何依赖于生态位重叠。这项工作的目的是增加对新组织如何创建，为什么它们在形式上有所不同，以及组织变化如何影响市场集中度的理解。应用包括市场定位和选址决策

This project extends and tests mathematical models of the growth and decline of organizations. The main focus is explain- ing why so many different types of organizations develop. Factors include population density, environmental stability, market concentration, and niche width. Boundaries around or- ganizations and social networks within and among groups of organizations are the two main factors affecting changes in social structure. Models to be developed and tested sown how changes in boundaries affect the number and diversity of or- ganizations in a community, and how interactions among popula- tions of organizations depend upon niche overlap. The work aims to increase understanding of how new organizations get created, why they vary in form, and how organizational variation affects market concentration. Applications include market positioning and siting decisions.//