Econ Papers Daily / 期刊论文
CvdN均衡的存在性与性质
Existence and nature of CvdN equilibrium
摘要
CvdN equilibrium extends ratio equilibrium to local public good economies. A key and unique feature of CvdN equilibrium is that jurisdictions are fully endogenized, where the equilibrating factor is agents’ agreement on public good levels and the sharing of public good production costs. We show equilibrium existence and sorting behavior for a large class of public good economies. We furthermore elucidate how key aspects of the economy influence the nature of CvdN equilibrium, including the role of consumption preferences, jurisdictional preferences, and properties of the public good production function. These factors make possible different equilibrium jurisdiction structures, including the grand coalition, only singletons, or intermediate-sized jurisdictions, as well as jurisdictions with homogeneous or heterogeneous membership. Usefully, because it fully endogenizes jurisdiction formation, CvdN equilibrium offers a unified approach to economies with local public goods and those with global public goods, and it facilitates investigation into the underlying factors of an economy that lead to public goods being provided locally or globally. Our model can provide microfoundations for multiple concepts from the literature, including homophily, segregation, sorting, and small-group effectiveness.
中文摘要
CvdN均衡将比例均衡扩展至地方公共品经济。CvdN均衡的一个关键且独特之处在于，辖区完全内生化，其均衡因素在于代理人对公共品水平及公共品生产成本分摊的共识。我们证明了在广泛类别的公共品经济中均衡的存在性与分群行为。此外，我们阐明了经济的关键方面如何影响CvdN均衡的性质，包括消费偏好、辖区偏好以及公共品生产函数特性的作用。这些因素使得不同的均衡辖区结构成为可能，包括大联盟、仅单个成员、或中等规模辖区，以及同质或异质成员构成的辖区。有用的是，由于完全内生化辖区形成，CvdN均衡为地方公共品经济与全球公共品经济提供了统一的分析框架，并有助于探究导致公共品在地方或全球层面供给的经济深层因素。我们的模型可为文献中的多个概念提供微观基础，包括同质性偏好、隔离、分群及小群体有效性。