Today's New York Times reports on a recent study by Daniel Klein. Klein sampled over 1000 U.S. academics as to their party affiliations. Here are a few salient facts:
1. In the humanities and social sciences, Democrats outnumber Republicans by at least seven to one.
2. For nonacademic practitioners, the numbers are not nearly so skewed. Either there is bias against Republicans, or Republicans prefer other options over academia more than Democrats do. I am more inclined to the latter option, but this requires investigation.
3. Among anthropologists, the ratio of Democrats to Republicans is about thirty to one. For economists it is "only" three to one.
4. Stanford and Berkeley have especially high ratios of Democrats to Republicans, about nine to one; this is taken from voter registration records, rather than the questionnaires.
Here is a link to the original research, go to the bottom left of the page for the relevant leads.