We investigate refinements of two solutions, the saddle and the weak saddle, defined by Shapley (1964) for two-player zero-sum games. Applied to weak tournaments, the first refinement, the mixed saddle, is unique and gives us a new solution, generally lying between the GETCHA and GOTCHA sets of...

In a laboratory experiment, we use an extensive form two person trust game to examine the hypothesis that human subjects have a preconscious friend-or-foe (FOF) mental mechanism for evaluating the intentions of another person. Instructions are used to weakly prime the FOF state: instead of the...

Two symmetric sellers are approached sequentially by fragmented buyers. Each buyer conducts a second-price auction and purchases from the seller who offers the lower price. Winning an auction affects bidding for future contracts because the sellers have nonconstant marginal costs. We assume that...