We study the effect of stochastically delayed communication on common knowledge acquisition (common learning). If … messages do not report dispatch times, communication prevents common learning under general conditions even if common knowledge … is acquired without communication. If messages report dispatch times, communication can destroy common learning under …

and statements, and we investigate whether communication improves information aggregation and the accuracy of group … decisions. Our findings suggest that the effect of communication depends on the underlying accuracy of individual judgments …. Communication improves accuracy when individuals tend to be incorrect, but diminishes it when individuals are likely to be correct …