Too lazy to break out the stats, but a fair comparison would be international undergrad and grad as opposed to the aggregate.

Harvard is actually a large graduate school that happens to teach some undergrads. Berkeley's main purpose is undergrad education.

He said UC system, your data is only for UCB.

Not saying his opinion is not baseless or wrong, but your rebuttal is flawed as well.

You're not wrong. The assumption was that UCB is broadly representative. Looking at the full system data: https://www.universityofcalifornia.edu/infocenter/fall-enrol...

Given my own knowledge of the UC system, berkeley seems the most international, which is why I thought simply citing berkeley would be enough. But, point taken. Let's look into the system data.

The total UC enrollment is 286271. Of this, there are 40219 Non-resident international students, which means there are 14% international students in the UC system as a whole. Thus, my using just berkeley actually shifted the data in my opponent's favor, since -- as I hypothesized -- Berkeley does indeed have more international students as a percentage of enrollment.

Thanks for the data.

Campus-wise, my anecdotal observation would be Irvine or Davis has most of international students by percentage, though.

According to the data gp linked, Irvine and Davis are 16% and 27% white. If you were assuming all non-whites at Irvine or Davis were not American, let this be a teachable moment.

Perhaps you're right. I haven't visited either in years! When I was there last, UC Irvine had the most ethnic Asian students, but they were mostly Americans. That may have changed.