Replication Data for: Greener Governments: Partisan Ideologies, Executive Institutions and Environmental Policies

Why do some governments have more environmentally friendly policies than others? Part of the answer involves governing parties’ ideological positions on environmentalism and the constraints imposed by executive institutions. Here, this party-based explanation is elaborated and tested with uniquely comparable indicators of national environmental policies for governments in 27 countries in the European Union (EU). The findings show that governments with parties that emphasized environmental protection in their manifestos are more likely to propose pro-environment policies during EU-level negotiations. However, the effect of ideology is mediated by the centralization of the national executive branch. In centralized national executives, the environmental positions of prime ministers’ parties affect policies, while in decentralized national executives, the positions of environment ministers’ parties are relevant. The findings have implications for understanding the impact of parties’ environmental positions on government policies, as well as for policy making in coalitions more generally.为何部分国家政府推行的环境政策相较他国更为环保？部分答案在于执政党在环保主义议题上的意识形态立场，以及行政机构施加的约束条件。本文针对欧盟（European Union, EU）27个成员国政府的国家环境政策，采用独具可比性的指标，对这一基于政党视角的解释框架进行阐释与验证。研究结果显示，若执政党在其竞选纲领中强调环境保护，该国政府在欧盟层面的谈判中更有可能提出亲环境政策提案。不过，意识形态的影响受到国家行政部门集权程度的中介调节：在行政集权的国家中，总理所在政党的环保立场会对政策产生影响；而在行政分权的国家中，则是环境部长所在政党的环保立场发挥作用。本研究结果不仅有助于理解政党环保立场对政府政策的影响，也为更广泛场景下的联合政府决策提供了参考启示。