Party activists face a coordination problem: a critical mass (a barrier to coordination) must advocate a single policy alternative if the party is to succeed. The need for direction is the degree to which the merits of the alternatives respond to the underlying mood of the party. An individual's...

Price comparison websites are commonly thought to benefit consumers by increasing competitive pressure between firms, in turn lowering prices faced by consumers. This article investigates the impact of the introduction of a PCW or ‘web aggregator’ to the market for a homogeneous good. We...

In a Lucas-Phelps island economy, an island has access to many informative signals about demand conditions. Each signal incorporates both public and private information: the correlation of a signal׳s realizations across the economy determines its publicity. If information sources differ in...

In a plurality-rule election, a group of voters must coordinate behind one of two challengers in order to defeat a disliked status quo. Departing from existing work, the support for each challenger must be inferred from the private observation of informative signals. The unique equilibrium...

In the context of a "beauty-contest" coordination game (in which pay-offs depend on the quadratic distance of actions from an unobserved state variable and from the average action), players choose how much costly attention to pay to various informative signals. Each signal has an underlying...

Party activists wish to (i) advocate the best policy and yet (ii) unify behind a common party line. An activist`s understanding of his environment is based on the speeches of party leaders. A leader`s influence, measured by the weight placed on her speech, increases with her judgement on policy...

Firms selling multiple quality-differentiated products frequently alter their product lines when a competitor enters the market. We present a model of multiproduct monopoly and duopoly using a general "upgrades" approach that yields a powerful analytical framework. We provide an explanation for...