Personalism or party platform? Gender quotas and women's representation under different electoral system orientations.

Underrepresentation of women in politics is a matter of great concern to social scientists, citizens, and policymakers alike. Despite effort over the past decade to ameliorate it with gender quotas of different types, scientific research provides a mixed picture on the extent to which quotas can close these gender gaps under different conditions. We approach this puzzle by focusing on the orientation of electoral systems-candidate-centered vs. platform-centered-as a context that conditions the effect of quotas on representation. Our analyses of 76 countries' electoral rules and legislatures show that contrary to expectations, it is in candidate-oriented systems that quotas facilitate stronger effect on women's representation. Even after considering proportional representation, district magnitude, human development, or labor-force participation as alternative explanations, we show that quotas foster greater increases in gender representation in candidate-oriented systems. The broader implications are that in electoral systems that tend to have larger gender gaps, quotas have a substantial contribution to equal representation.