Over the past decades, the growing proliferation of international institutions governing the global environment has impelled institutional interplay as a result of functional and normative overlap across multiple regimes. This article synthesizes primary contributions made in research on institutional interplay over the past twenty years, with particular focus on publications with International Environmental Agreements: Politics, Law and Economics. Broadening our understanding about the different types, dimensions, pathways, and effects of institutional interplay, scholars have produced key insights into the ways and means by which international institutions cooperate, manage discord, engage in problem solving, and capture synergies across levels and scales. As global environmental governance has become increasingly fragmented and complex, we recognize that recent studies have highlighted the growing interactions between transnationally operating institutions in the wake of polycentric governance and hybrid institutional complexes. However, our findings reveal that there is insufficient empirical and conceptual research to fully understand the relationship, causes, and consequences of interplay between intergovernmental and transnational institutions. Reflecting on the challenges of addressing regulatory gaps and mitigating the crisis of multilateralism, we expound the present research frontier for further advancing research on institutional interplay and provide recommendations to support policy-making.

在过去的几十年中，管理全球环境的国际机构日益增多，由于多个制度的功能和规范重叠，推动了制度相互作用。本文综合了过去 20 年来在制度相互作用研究方面的主要贡献，特别关注与《国际环境协定：政治、法律和经济学》相关的出版物。学者们拓宽了我们对制度相互作用的不同类型、维度、途径和影响的理解，对国际机构合作、管理不和谐、参与解决问题以及捕捉跨级别和规模的协同作用的方式和手段提出了重要见解。随着全球环境治理变得越来越分散和复杂，我们认识到最近的研究强调了在多中心治理和混合机构复合体之后跨国经营机构之间日益增长的互动。然而，我们的研究结果表明，没有足够的实证和概念研究来充分理解政府间和跨国机构之间相互作用的关系、原因和后果。