Just thought I'd briefly note here a point I have mentioned many times before on this blog and on various comment boards:
There really is no way in which conservatives are discriminated against in hard sciences. Conservative mathematicians, for example, produce output of exactly the same quality and type as liberal mathematicians, and there is no way to discriminate on the basis of a person's cv, publication record, or job talk.
Conservative bloggers have been passign around the recent study on the liberal domination of academia. It seems to me, though, that the data collected in this study undermines the claims of bias much more than it supports them. If one looks at the imbalance between liberals and conservatives by discipline, we find that liberals outnumber conservatives 70%-to-20% in the sciences, 75%-to-10% in the social sciences, and 80-to-10% in the humanities.
The conclusion from this is that if somehow the politicization of the humanities was entirely removed - and furthermore the ability to pinpoint conservatives eliminated - we should not be surprised to find liberals outnumber conservatives 70%-to-20% as they do in math.
Of course, liberals outnumber conservatives 80%-to-10% in the humanities. How much of the difference is due to bias and how much of it is to other factors like difference in inclination is unclear for now.