Tullock contests with asymmetric information

We show that under standard assumptions a Tullock contest with asymmetric information has a pure strategy Bayesian equilibrium. Moreover, two-player common-value Tullock contests in which one of the players has an information advantage have a unique equilibrium. In equilibrium both players exert the same expected effort, and although the player with information advantage wins the prize with probability less than one-half, his payoff is greater or equal to that of his opponent. In common-value Tullock contests with more players any information advantage is rewarded, but the other properties of two players contests do not hold