Krugman is sometimes a dull example of all that is both right and wrong with mainstream liberals in North America. Today Krugman auto deconstructs:
Ideas Are Not The Same As Race
I would get into the specifics of his post but the headline is so atrocious and such a shining example of why economists are simply undereducated in the social sciences, humanities and hard sciences. Here is the short of it, both race and gender are ideas in that they have no scientific merit. Take a look at this little graphic from wikipedia
His title is thus a non sequitur wrapped inside a false antithesis.
*Excuse the botched singular.