We study communication in ambiguous environments. Agents communicate individual decisions sequentially. Based on the signal that an agent receives, she revises her private information. When signals are ambiguous, we show that agents may agree to disagree forever. Although the learning process...

We show what the rational inattention model predicts about the treatment effect of information provided during a randomized control trial. This is a non-trivial question because the model implies optimal attention choice before, during, and after an information treatment. The predictions of the...