Experimental design to persuade.

Abstract A sender chooses ex ante how information will be disclosed ex post. A receiver obtains public information and information disclosed by the sender. Then he takes one of two actions. The sender wishes to maximize the probability that the receiver takes the desired action. The sender optimally discloses only whether the receiver\u0027s utility is above a cutoff. I derive necessary and sufficient conditions for the sender\u0027s and receiver\u0027s welfare to be monotonic in information. In particular, the sender\u0027s welfare increases with the precision of the sender\u0027s information and decreases with the precision of public information.