information, but differ in two dimensions: the rules governing communication, which determine whether information is verifiable …; and the sender's commitment power, which determines the extent to which she can commit to her communication strategy …. Our design exploits these variations to explicitly test for the role of rules and commitment in communication. Our …

communication between subjects. In reality, however, altruism usually requires interaction between givers and receivers, which … altruism are built on human sociality. We experimentally examine communication in which one subject allocates $10 between … recipients had been able to ask, even when they were silent. We conclude that communication dramatically influences altruistic …