We examine dynamic search as a game in which two rivals explore (an island) for a hidden prize of known value. In every period until its discovery, the players decide how much of the unsearched area to comb. If a player finds the prize alone he wins it and the game ends. Players have a...

We study contests in which the prize depends on the number of participants, and show that equilibrium effort can be increasing, decreasing, or non-monotonic in the number of participants. This contrasts with the standard result for contests with fixed prizes in which effort is decreasing in the...

We study the optimal behaviour of a cartel faced with fringe competition and imperfectly attentive consumers. Intertemporal price dispersion obfuscates consumer price comparison which aids the cartel through two channels: it reduces the effectiveness of free riding by the fringe; and it relaxes...

We develop a theory of optimal collusive intertemporal price dispersion. Dispersion clouds consumer price awareness, encouraging firms to coordinate on dispersed prices. Our theory generates a collusive rationale for price cycles and sales. Patient firms can support optimal collusion at the...

In many contests, a participant’s choices can influence the value of the prize on offer. However, in the standard contest model, the value of the prize is exogenous and participants have discretion only over the effort they exert. This paper proposes a new type of N -player contest in which...