In low- and middle-income countries (LMICs), naturally occurring social networks may be particularly vital to health outcomes as extended webs of social ties often are the principal source of various resources. Understanding how social network structure, and influential individuals within the...

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...

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...

Human behaviour is thought to spread through face-to-face social networks, but it is difficult to identify social influence effects in observational studies 9–13, and it is unknown whether online social networks operate in the same way 14–19. Here we report results from a randomized...

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 fi nd that having one or both MAOA alleles of...

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...

We examine the social network structure of Congress from 1973-2004. We treat two Members of Congress as directly linked if they have cosponsored a bill together. We then construct explicit networks for each year using data from all forms of legislation, including resolutions, public and private...