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On the afternoon of Tuesday, September 11, 2001, a group of social scientists at the Institute for Social Research (ISR) gathered to consider how they might employ their talents to help the country after the shocking events of that morning. The group included economists, political scientists, psychologists, sociologists, demographers, and survey methodologists. Based upon their previous research experience, each of them proposed hypotheses on aspects of American life and individuals' morale and behavior that were most likely to be affected. While they were relatively confident about expected relationships in the short term, we were uncertain about how temporary or permanent these changes might be or how intertwined and mutually reinforcing they could become.