[thomaslangston]

What does R1 mean in this context?

[logisticseh]

Universities that offer doctoral degrees and have "Very High Research Activity" according to the Carnegie Classification of Institutions of Higher Education.

Specifically, the 130 or so institutions listed here: https://en.wikipedia.org/wiki/List_of_research_universities_...

Heuristically, think "major private universities and flagship public universities".