Literal Proof That Liberals Do Not Understand Economics

Do liberals/progressives understand economics? The results from a recent study show the answer to be a resounding no. Daniel Klein, professor of economics at George Mason University, along with a Zogby researcher conducted a simple test described in this Wall Street Journal op-ed. Klein writes:

How did the six ideological groups do overall? Here they are, best to worst, with an average number of incorrect responses from 0 to 8: Very conservative, 1.30; Libertarian, 1.38; Conservative, 1.67; Moderate, 3.67; Liberal, 4.69; Progressive/very liberal, 5.26.Americans in the first three categories do reasonably well. But the left has trouble squaring economic thinking with their political psychology, morals and aesthetics.

Or, maybe they just don't understand economics.