Heroes and Cowards demonstrates the role that social capital plays in people's decisions. The makeup of various companies--whether soldiers were of the same ethnicity, age, and occupation--influenced whether soldiers remained loyal or whether they deserted. Costa and Kahn discuss how the...

Much of the increase in the prevalence of overweight and obesity has been in developing countries with a history of famines and malnutrition. Prior research has pointed to the association between overweight and famine exposure during developmental ages as one of several explanations and has...