Ivy League have produced many Nobel laureates, winners of the Nobel Prize and the Nobel Memorial Prize in Economic Sciences. According to the Nobel Foundation's website, the number of prize-winners affiliated with each Ivy League university at the time of their awards is: Brown, 2; Columbia, 17; Cornell, 8; Dartmouth, 0; Harvard, 36; Penn, 4; Princeton, 14; and Yale, 8. In addition, each university self-reports their number of affiliated Nobel laureates, but they use varying definitions for which Nobel winners they claim (for example, alumni, active faculty, former faculty, visiting faculty, adjunct faculty, etc.) Collaboration between the member schools is illustrated by
Ivy League in 1937. Yale and Columbia previously fielded teams in the league but no longer do so. The Ivy League is home to some of the oldest college rugby teams in the United States. Although these teams are not "varsity" sports, they compete annually in the Ivy Rugby Conference. The table above includes the number of team championships won from the beginning of official Ivy League competition (1956–57 academic year) through 2016-17. Princeton and Harvard have on occasion won ten or more Ivy League titles in a year, an achievement accomplished 10 times by Harvard and 24 times by Princeton, including