Why Women Mayors Shrink Party Gender Gaps Despite Fewer Resources

📊 The Argument: How Descriptive Representation Rebuilds Parties

Descriptive representation can strengthen democracy by making party organizations more inclusive. The central theory is that parties retain and promote incumbents according to gendered criteria, which creates disproportionate incentives for women to recruit party members. At the same time, gendered resource inequalities reduce women’s access to the patronage networks and resources typically used for recruitment. Faced with these constraints, women respond by recruiting more women—because it lowers recruitment costs, fits role expectations, and makes credit claiming easier.

🔎 What Evidence Was Used and How It Was Tested

• Administrative party membership records covering municipal governments in Brazil from 2004 to 2020.
• A regression discontinuity design to identify causal effects around electoral thresholds.

📈 Key Findings

• Despite facing resource disparities, women mayors recruit new party members at rates similar to men.
• Women mayors substantially reduce the gender gap in party membership by recruiting proportionally more women.
• Consistent with the theory, women are more likely to be promoted in constituencies where they most reduce the gender gap in party membership.
• Increases in women’s membership are associated with improved party resilience.

🔑 Why This Matters

These results show a concrete pathway through which descriptive representation bolsters party building: electing women can expand and diversify party organizations, bringing previously underrepresented citizens into party life and strengthening parties’ organizational durability.