Many of those who reject the idea of economic models are ill-informed or even (perhaps unconsciously) intellectually dishonest. Still, there are high… - Paul Krugman

The idea of comparative advantage—with its implication that trade between two nations normally raises the real incomes of both—is, like evolution via natural selection, a concept that seems simple and compelling to those who understand it. Yet anyone who becomes involved in discussions of beyond the narrow circle of academic economists quickly realizes that it must be, in some sense, a very difficult concept indeed.

More than four years after the financial crisis began, the world's major advanced economies remain deeply depressed, in a scene all too reminiscent of the 1930s. And the reason is simple: we are relying on the same ideas that governed policy in the 1930s. These ideas, long since disproved, involve profound errors both about the causes of the crisis, its nature, and the appropriate response.
These errors have taken deep root in public consciousness and provide the public support for the excessive austerity of current fiscal policies in many countries. So the time is ripe for a in which mainstream economists offer the public a more evidence-based analysis of our problems.</p>

Many liberals have changed their views in response to new evidence. It’s an interesting experience; conservatives should try it some time.