We use variation in wind speeds at surfing locations in Switzerland as exogenous shifters of users' propensity to post content about their surfing activity onto an online social network. We exploit this variation to test whether users' online content generation activity has a causal effect on...

We examine a duopoly where one of the firms does not maximize profit, but instead maximizes customer surplus subject to a profit constraint. (Customer surplus for a firm is the sum of its customers' individual consumer surpluses, i.e., the dollar value the customer attaches to the product minus...