Are campaigns for different offices isolated events, or do candidates observe and learn from each other? For example, when choosing which issues to emphasize, do candidates focus solely on their own strengths and their constituents' desires, or do they emulate one another? The answers to these...

Formal models of revolutionary collective action suggest that ‘informational cascades’ play a crucial role in overcoming collective action problems. These models highlight how information about the aggregate level of participation in collective action conveys information about...