We construct the complete network of 26,681 majority opinions written by the U.S. Supreme Court and the cases that cite them from 1791 to 2005. We describe a method for using the patterns in citations within and across cases to create importance scores that identify the most legally relevant...

Research on happiness has produced valuable insights into the sources of subjective well-being. A major finding from this literature is that people exhibit a baseline happiness that shows persistent strength over time, and twin studies have shown that genes play a significant role in explaining...

Using a discovery and replication sample from a U.S. representative data set, we show that a functional polymorphism on the MAOA gene is associated with credit card borrowing behavior. For the combined sample of approximately 12,000 individuals we find that having one or both MAOA alleles of the...

We address leadership emergence and the possibility that there is a partially innate predisposition to occupy a leadership role. Employing twin design methods on data from the National Longitudinal Study of Adolescent Health, we estimate the heritability of leadership role occupancy at 24%. Twin...

We explore the influence of genetic variation on subjective well-being by employing a twin design and genetic association study. In a nationally representative twin sample, we first show that 33% of the variation in life satisfaction is explained by genetic variation. Although previous studies...

Peers have a powerful effect on adolescents’ beliefs, attitudes, and behaviors. Here, we examine the role of social networks in the spread of attitudes towards sexuality using data from the National Longitudinal Study of Adolescent Health (Add Health). Although we found evidence that both...

Research on happiness has produced valuable insights into the sources of subjective well-being that are of importance to economics. A major nding from this literature is that people exhibit a "baseline" level of happiness that shows persistent strength over time. Here we explore the extent to...

Research on happiness has produced valuable insights into the sources of subjective well-being. A major finding from this literature is that people exhibit a "baseline" happiness that shows persistent strength over time, and twin studies have shown that genes play a significant role in...