Not All Majority-based Social Choice Functions Are Obviously Strategy-proof

We consider two families of strategy-proof social choice functions based on the majority principle: extended majority voting rules on the universal domain of preferences over two alternatives and generalized median voter... [ view full abstract ]

We consider two families of strategy-proof social choice functions based on the majority principle: extended majority voting rules on the universal domain of preferences over two alternatives and generalized median voter schemes on  the domain of single-peaked preferences over a finite and linearly ordered set of alterna-tives. We characterize their respective subclasses of obviously strategy-proof social choice functions, which are substantially smaller than theircorresponding strategy-proof classes.