Charness, Gary; Dimant, Eugen; Grieco, Daniela - 2026
We introduce the "blue lies game," a sender-receiver interaction where lying benefits both the liar and her ingroup member at the outgroup's expense. Across 9,672 U.S. participants assigned to groups based on either random allocation or political partisanship, 38-57% of senders lie. An ingroup...