The phenomenon of predating predators requires at least three specimens to whom we refer as players 1, 2, and 3. Player 1 has simply to guess nature when trying to find food. Player 2 is hunting player 1 in the hope that 1 is well fed but must also avoid being hunted by player 3. One major...

By vetoing one question mutually efficient agreements. On the other hand, the threat of vetoing may prevent exploitation. Based on a generalization of ultimatum bargaining (Suleiman, 1996), we first elicit the responders' certainty equivalents for three different degrees of veto power....