This study investigates how partisan endorsements influence officials' interest in policies.

Context:

The research partners with a non-profit to examine policy learning during a campaign promoting new policies among US local representatives.

Methodology & Intervention:

Researchers randomly assigned whether the initiative was endorsed by co-partisans, out-partisans, or both parties.

Key Findings:

• Legislators showed significantly greater interest when endorsements came from members of their own party.
• Bipartisan initiatives attracted less interest compared to policies backed solely by one side.
• The partisan effect on interest remained strong even in competitive districts.

Implications:

The results indicate that ideological preferences do not entirely explain how partisanship affects policy learning. This field experiment demonstrates a clear causal role for party alignment in driving officials' engagement with specific policies.