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 sixteen men's and sixteen women's sports. In some sports, Ivy teams actually compete as members of another league, the Ivy championship being decided by isolating the members' records in play against each other; for example, the six league members who participate in ice hockey do so as members of ECAC Hockey, but an Ivy champion is extrapolated each year. In one sport, rowing, the Ivies recognize team champions for each sex in both heavyweight and lightweight divisions. While the Intercollegiate Rowing Association governs all four sex- and bodyweight-based divisions of rowing, the only one that is sanctioned by the NCAA