"...I have long believed that the one true test of whether a person is an economist is how devoutly he or she lives by the principle of comparative advantage. And I don't mean just preaching it, but actually practicing it. For example, I always harbour doubts about my economist friends who tell me that they mow their own lawns, rather than hiring a gardener, because they actually enjoy cutting grass. Such a claim is suspect on its face. But, more to the point, a true believer in comparative advantage should be constitutionally incapable of enjoying such activities; the David Ricardo in him should make him feel too guilty."*
*Alan S. Blinder, in Central Banking in Theory and Practice, MIT Press London 1999 p.1