Cheap Talk with Two Senders and Complementary Information

This paper studies a cheap talk model with two senders having partial and non-overlapping private information communicating with an uninformed receiver. The two senders’ private information is complementary in the sense that the marginal impact of one sender’s private information on the receiver’s ideal action depends on the other sender’s private information. When the two senders communicate simultaneously, their information transmission exhibits strategic complementarity: more information transmitted by one sender leads to more in-formation transmitted by the other sender. When the two senders have like biases, it is always optimal for the receiver to delegate the decision rights to the sender with a smaller bias. When two senders have opposing biases, simultaneous communication is more likely to dominate delegation