In the last two decades, happiness has moved into the focus of economic inquiry. Frey and Stutzer (“What can Economists Learn from Happiness Research”, Journal of Economic Literature 20, 2002, pp. 402-435) argue convincingly that gross domestic product (GDP), unemployment, inflation, and many other indicators of economic performance are primarily interesting because they are correlated with the well-being of people. Without the assumption that these parameters are proxies for happiness, there would be no reason to pursue economic policies that maximize i...