Female political representation and budget forecast errors

This paper examines how female representation in municipal executive boards — the primary budgetary decision-making bodies in Italian local governments — affects both the accuracy and bias of budget forecasts. We exploit Law 56/2014, which mandated gender quotas in municipalities with more than 3000 residents, to identify causal effects. Using an instrumental variable approach, we find that a one–percentage-point increase in the share of female aldermen reduces expenditure and revenue forecast errors by 0.5 and 0.4 percent, respectively, and systematically mitigates the prevailing optimistic bias in projections, particularly in pre-election years. Mechanism analyses highlight two main channels: (i) higher levels of technical competence and (ii) lower scope for political manipulation, with the strongest effects observed in social spending and in regions with weaker accountability.