While I acknowledge that left-wingers are overrepresent[ed] in academia, I think this is an efficient market outcome and I think that Bryan's claims of the harm from leftist policies is overblown.
This is not because I think leftist policies aren't harmful, but because the idea that we would all live life in the best libertarian traditions if only those evil professors had not brainwashed us with Marxist propaganda is plainly nonsense.
Of course Winterpseak is right, though I don't think I said anything so extreme. All I said was that academic leftism has negative externalities. I didn't say that it's the only negative externality, or anything like that.
But Winterspeak does raise an interesting question: How much influence does academia have? Or to make the question more pointed: What would happen to policy if the average academic were as libertarian as the average GMU economist?
The short-term effect, I'll admit, would be negligible. Ideas and policy don't change quickly. But I still think that twenty years of libertarian dominance in the university system would make average college-educated opinion at least one standard deviation more libertarian. This would in turn have large indirect effects, via journalism, political slack, etc. My guess is that every standard deviation increase in the libertarianism of college-educated opinion would lead to about a half standard deviation increase in the libertarianism of policy.
Why, then, do leftist academics seem so impotent? They are victims of their own success. They've already gotten most of what their ideology demands. We have progressive income taxes, Social Security, Medicare, discrimination laws, etc. And especially considering indirect effects on journalism, policy-makers, etc., I'd say that leftist academics deserve 25-50% the blame. In any case, since they've gotten most of what they want, leftist academics don't have much left to do other than promote their least popular ideas.
After fifty years of libertarian dominance in academia, we'd be in the same situation. Lots of our least-favorite policies would be drastically scaled back. But we'd seem out of touch for demanding abolition, and spend a lot of time complaining that "No one listens to us."