Two contestants informed of their own type compete in a contest, and the organizer ex-ante designs a public anonymous disclosure policy to maximize contestants’ total effort. While a mildly-correlated posterior leads to an efficient equilibrium with maximized surplus, a...

We study the information design for effort maximization in a simultaneous two-player two-type all-pay auction contest environment, where players have private information about their own valuations. Full characterization of the optimal signal crucially rests on the notion of ridge distributions:...