Recently the Government of India used procurement auction mechanisms with endogenously determined minimum quality. We find these auctions have no equilibrium in continuous symmetric monotonic pure strategies. This may substantiate the use of auction mechanisms with exogenously determined minimum...

We present an alternative proof of Fishburn’s (1975) axiomatization of lexicographic preferences. The essence of our proof lies in identifying “an extremely pivotal factor”. Our proof reconfirms the strong interconnections between Arrow’s and Gibbard–Satterthwaite’s theorems with...

We revisit the classic comparison between Bertrand and Cournot outcomes in a mixed market with private and public firms. The results are often strikingly different and opposite to the ones obtained from a similar comparison in the standard setting with all profit-maximizing firms.

We show that every strategy-proof random social choice function is a convex combination of strategy-proof deterministic social choice functions in a two-alternative voting model. This completely characterizes all strategy-proof random social choice functions in this setting.