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 to refer to the Ancient Eight plus several other schools for purposes of alumni associations, university affiliations, or endowment comparisons. In his book "Untangling the Ivy League", Zawel writes, "The inclusion of non–Ivy League schools under this term is commonplace for some schools and extremely rare for others. Among these other schools, Massachusetts Institute of Technology and Stanford University are almost always included. The University of Chicago and Duke University are often included as well." In their 2015 book "Acing Admissions", Mehta and Dixit write, "The ["Ivy Plus" schools] include, but are not limited to: Massachusetts Institute of Technology (MIT),