Can a competitive market implement an ideal search engine? To address this question, we construct a two-sided market model in which consumers with limited, idiosyncratic vocabulary use keywords to search for their desired products. Firms get access to a keyword if they pay its competitive...

What is common to the following situations: incentivizing collective action in the presence of social preferences, monopoly pricing when consumers are loss averse, arms races when players are privately informed of their armament costs? We present a simple formalism, called X-games, which unifies...

We study a repeated principal-agent interaction, in which the principal offers a "spot" wage contract at every period, and the agent’s outside option follows a Markov process with i.i.d shocks. If the agent rejects an offer, the two parties are permanently separated. At any period during the...

We incorporate reference-dependent preferences into a search-and-matching model of the labor market, in which firms have all the bargaining power and productivity follows an AR(1) process. Motivated by Akerlof (1982) and Bewley (1999), we assume that existing workers are willing to exert unobserved,

We study a market model in which competing firms use costly marketing devices to influence the set of alternatives which consumers perceive as relevant. Consumers in our model are boundedly rational in the sense that they have an imperfect perception of what is relevant to their decision...

When a firm decides which products to offer or put on display, it takes into account the products' ability to attract attention to the brand name as a whole. Thus, the value of a product to the firm emanates from the consumer demand it directly meets, as well as the indirect demand it generates...

A principal contracts with agents who have diverse abilities to forecast changes in their future tastes. While the principal knows that the agent’s tastes are changing, the agent believes that with probability ?, their future preferences will be identical to their present preferences. The...

When agents hold non-common priors over an unverifiable state of nature which affects the outcome of their future actions, they have an incentive to bet on the outcome. We pose the following question: what are the limits on the agents' ability to realize gains from speculative bets when their...

We propose to view action-contingent contracts as bets, motivated by different prior beliefs between the contracting parties (rather than, say, as an instrument for overcoming moral hazard problems). Such differences in prior beliefs may arise from inherent biases such as over-optimism. Menus of...