We set up a game-theoretic model to examine the oligopolistic price competition, considering two features of online search: the existence of a common search ordering and shoppers who have non-positive search cost. We find that in equilibrium firms set their prices probabilistically rather than...

Online anonymity has posed a significant threat on online reputation mechanisms and online identity management. How to improve the reliability and effectiveness of online reputation has thus become an important question of theoretical and practical interest. We examine a reputation market in an...

We develop a system for grid computing where the price of computing tasks is determined by an audited market-exchange. We show a method to provide a variable certificate, called \witness," of program execution with the following property: If two different agents running the same program on the...