In nash equilibrium, agents are autarchic in their optimization protocol, whereas in Kantian equilibrium,they optimize in an interdependent way. Typically, researchers into the evolution of homo economicus treat preferences as being determined by selective adaptation, but hold fixed the...

Whether or not to vaccinate one's child is a decision that a parent may approach in several ways. The vaccination game, in which parents must choose whether to vaccinate a child against a disease, is one with positive externalities (herd immunity). In some societies, not vaccinating is an...

We study a vertically differentiated market where two firms simultaneously choose the quality and price of the good they sell and where consumers also care for the average quality of the goods supplied. Firms are composed of two factions whose objectives differ: one is maximizing profit while...

The CNN exit polls after the 2004 election rated moral values the most important issue; next came jobs and the economy. Eighty percent of the voters who rated moral values the most important issue voted for Bush while eighty percent of the voters who rated jobs and the economy the most important...

Axiomatic bargaining theory (e.g., Nash's theorem) is static. We attempt to provide a dynamic justification for the theory. Suppose a Judge or Arbitrator must allocate utility in an (infinite) sequence of two-person problems; at each date, the Judge is presented with a utility possibility set in...