中文摘要：

区域合作是两个或多个地方政府为了从区域公共物品的供给中获益而进行的集体行动，但合作常由于高昂的交易成本而陷入困境，缓解困境的途径是构建一个合作型的政策网络。本研究采用案例研究方法，运用交易成本和政策网络视角对深莞惠界河治理进行分析。研究发现：合作型的区域治理网络拥有三角形节点和网络掮客，三角形节点使行动者嵌套在多个合作项目中，产生凝聚型社会资本；网络掮客通常为上级政府或区域组织，连结、协调不同行动者，培育了搭桥型社会资本，两种社会资本有效地降低交易成本，缓和合作困境；网络掮客对地方横向合作实施了“软科层”约束，使横向区域合作嵌套在纵向科层中。

英文摘要：

Regional cooperation is a collective action in which two or more governments act collectively to capture the gains from providing regional public goods. However, cooperation often drops into dilemma because of high transaction cost. The approach to mitigate dilemma is to build a collaborative policy network. Using exploratory case study, this study focu- ses on cooperation dilemmas and mitigation measures of boundary river governance in Shen--Guan--Hui. The study reveals that collaborative poliey networks have triangle bonding and network broker. The triangle bonding has a strong nesting relationship and can produce bonding capital. The network broker can generate bridging social capital by con- necting different actors and bridging structural holes or weak ties. Network brokers often are the regional organizations or a higher level government. Bonding and bridging social capital can decrease transaction cost and help regional coop- eration. Collective policy networks are affected by network brokers through ＂soft hierarchy＂, nested in the shadow of soft hierarchy authority.