It’s not a gold standard.
Here‘s a well resourced and researched standard. Published yearly by UMass.
Let me know what you think. This is a measure comparing only private universities.
View attachment 121053
I’ll have links later.
Please note, public universities are not included in this ranking. Million different ways to look at this, but comparing like to like, and research, which in my opinion is one of the primary missions of a University, along with educating students obviously, makes this measure an important one