Abstract
Firms and politicians, among others, invest heavily to influence people’s opinions. Because peers influence one another, these efforts must account for social networks. Using a model of opinion dynamics with a non-degenerate steady state, I develop a new measure of influence, and I highlight how opinion fluctuations impact influence campaigns. If agents interact less frequently with those holding different opinions, the variance of public opinion decreases. Consequently, a risk-averse planner focuses on persuading a large majority of agents in a small set of tightly knit groups, while a risk-loving planner makes much broader appeals. (JEL D11, D72, D83, D85, Z13)
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