政策學習與政策組裝的交織實踐：臺灣都市樹木管理制度的發展歷程與挑戰

The Intertwining of Policy Learning and Policy Assemblage: The Development and Challenges of Taiwan’s Urban Tree Management System

政策學習如何展開？跨國知識如何在地轉譯為可操作的治理制度？本研究回應政策學習理論對「知識—制度」轉化歷程的關注，以臺灣都市樹木管理為案例，從制度組裝的視角分析學習實踐中的挑戰與動能。
隨著氣候變遷與城市永續治理日益受到重視，都市樹木管理已成為各國城市政策的重點。相較之下，臺灣雖具多元跨國學習對象，但制度化進程受限於專業認證與技術標準的協商與延宕，顯示學習成果並非可直接導入本土治理結構，而需經由持續的轉譯與調適，回應地方產業、社會行動與行政實務的多元需求。
本研究指出，政策學習並非單向知識移植，而是一個動態的本土化歷程，涵括外來知識與在地經驗的整合、規範的轉譯與協商、行動者之間的協作與調適。都市樹木管理作為具象且跨部門的治理議題，提供理解政策學習如何影響制度建構的理論視角，並呈現制度建制作為一種多層次、非線性且充滿不確定性的治理實踐。

How does policy learning unfold? How can transnational knowledge be translated into locally operable governance institutions? This study addresses theoretical concerns within policy learning literature regarding the transformation from knowledge to institutions. Using the case of urban tree management in Taiwan, it analyzes the dynamics and challenges of learning through the lens of institutional assemblage.
As climate change and urban sustainability gain global prominence, urban tree management has become a key policy focus for cities worldwide. While Taiwan has access to diverse international models, the institutionalization of its urban tree policies has been constrained by prolonged negotiations and delays over professional certification and technical standards. These challenges suggest that policy learning outcomes cannot be directly imported into domestic governance structures but must instead undergo continuous translation and adaptation to align with the diverse needs of local industry, social movements, and administrative practices.
This study argues that policy learning is not a one-way knowledge transfer but a dynamic localization process involving the integration of external knowledge and local experience, the negotiation of norms, and the collaboration and adaptation among multiple actors. Urban tree management, as a concrete and cross-sectoral governance issue, provides a productive lens to examine how policy learning shapes institutional development. It further illustrates institution-building as a multi-level, non-linear, and uncertain process of governance in practice.