Replication Data for: Partisan Collaboration in Policy Adoption: An Experimental Study with Local Government Officials

Partisanship plays a central role in the policy process, but its impact on the adoption of collaborative strategy by policymakers remains unknown. To fill this gap, I conducted a conjoint experiment involving municipal officials across the United States, examining the effect of co-partisanship on policy collaboration and its moderating impact on collaborative attributes such as resource allocation, reciprocal trust, and policy outcome. The findings reveal that a collaborating partner’s co-partisanship status increases the likelihood of local policymakers adopting a program by 12.75 percentage points. Moreover, co-partisan program proposals generally enhance the favorability of collaborative attributes. Finally, the consistency of the co-partisanship effect across ideologies and various subgroups demonstrates that party identity is rooted in in-group loyalty and fundamentally affects the collaborative process.党派身份（Partisanship）在政策制定流程中占据核心地位，但其对政策制定者采纳协作策略的影响仍未明确。为填补这一研究空白，本研究开展了一项面向全美市政官员的联合实验（conjoint experiment），考察同党派身份（co-partisanship）对政策协作的影响，以及其对资源分配、互惠信任、政策结果等协作属性的调节效应。研究结果显示，协作伙伴的同党派身份可将地方政策制定者采纳某一方案的概率提升12.75个百分点。此外，同党派的方案提案通常能提升各项协作属性的认可度。最后，同党派身份的影响在各类政治意识形态与不同子群体中均保持一致，这表明党派身份植根于内群体忠诚，并从根本上影响协作流程。