The purpose of this study was to determine whether attitudes toward risk and altruism are affected by being in a group or being alone. In contrast to previous economic research on group decision-making, we excluded the effects of group informal discussions, which are thought to be a "black box"...

Japan's most powerful known earthquake struck at 2:46p.m. on Friday, March 11, 2011. We study the unusual trading behaviors of individual and foreign investors in Japan during the aftermath of this natural disaster. Individual investors typically show contrarian trading patterns, so the sharp...