Can money buy happiness? Is income a reliable measure for life satisfaction? In the West after World War II, happiness seemed inextricably connected to prosperity. Beginning in the 1960s, however, other values began to gain ground: peace, political participation, civil rights, environmentalism. "Happiness economics" -- a somewhat incongruous-sounding branch of what has been called "the dismal science" -- has taken up the puzzle of what makes people happy, conducting elaborate surveys in which people are asked to quantify their satisfaction with "life in general." In this book, three...