Economics
This New York Times op-ed column by Harvard economist Greg Mankiw proves the adage that economists know the cost of everything and the value of nothing. Perhaps I can explain it to the good professor. First, there are both winners and losers in free trade. Moving from a state in which there is no free trade (i.e., in which there are restrictions on trade) to a state in which there is free trade is not, in other words, a Pareto-superior move. Second, even if the winners win more than the losers lose (i.e., even if the movement to free trade is Kaldor-Hicks efficient), unless the winners are required to compensate the losers, which they are not, there are still losers—many of them blue-collar workers. Third, there is more at stake in the debate about free trade than material welfare. Free trade affects communities, families, and our culture. Why is there no mention of these things in Mankiw’s column?
Addendum: The following paragraph blows my mind:
Economists are, overwhelmingly, free traders. A 2006 poll of Ph.D. members of the American Economic Association found that 87.5 percent agreed that “the U.S. should eliminate remaining tariffs and other barriers to trade.”
“Should”? Given what ends? Economics is a social science, not a normative ethical theory such as utilitarianism. The most an economist can do, while acting as an economist, is to describe the costs of this or that action, law, or policy, leaving it to the actor, legislator, or policymaker to decide whether the costs are worth bearing. Economists are trained to evaluate means to given ends; they are not trained to evaluate ends. Economists can tell policymakers that if X is done, Y will occur; they cannot tell policymakers to do X. Economists present policymakers with various bundles of goods and bads and say, “Pick one”; they do not tell policymakers which bundle to pick.