That's a good source, then. There was another similar study, that was discussed here that did some kind of manual name-matching. That was a fatal flaw that invalidated the whole approach, in my opinion. I only wondered if they followed the same method, here.

It was a reasonable question, Phil. The sort of question raised in (dare I say it) peer review, which is a (dare I say it) good thing.

This study still suffers from lack of a control population for comparison.

So accepting for sake of discussion that you've proved once again that there are more liberals in the teaching profession than conservatives, what do you want to do about it?