Going back many decades, The Northeast private UG and medical Ivy League schools had linkage agreements specifying seats in medical schools assigned to applicants from specific UG colleges, some of which still exist. This goes way, way back to the long-standing, open, formal, and strict policies of racism, antisemitism, and anti-Catholicism these schools had in order to keep only the "right" kind of people enrolled, namely WASP blue-bloods. It wasnt until the early 2000's that the most restricted of these, Brown Med School, which had all of its seats assigned to its own UG or to other linked Ivies, thus preventing any other outsiders from even applying to the school. This ingrained "culture" still influences decision making on the med schools part even into the faculty and staff. One of my college classmates, now MD-PhD and professor, has told me he is the only one in his department at Brown who didnt either go to its medical school or residency program. BTW, this racism, antisemitism, and anti-Catholicism in medical schools parallels the of hospitals, which is why separate "WASP" (eg Columbia Presbyterian), Jewish (eg Mount Sinai) and Catholic (eg St. Vincent's) institutions are prevalent in most places. Public hospitals were often developed with support from "WASP" societies who wanted the poor taken care of just not in their hospitals. And this brief comment doesnt even touch on the HBCs, medical schools, and hospitals, that were still legally required thru the 1960s and effectively still echos in society. The American Hospital and Medical school system reflects the overall history of racism and discrimination of the US