ONE frequent stumbling block for the European project is the fact that different countries want different things. Recent Eurostat polling on self-reported happiness highlights those divergences. As usual, Scandinavians are the happiest people in Europe and retired Danish women are the cheeriest among them, reporting a happiness score of 8.5 out of 10. In general, geography is the best predictor of merriness, followed by pay. At all income levels a step up one quintile on the income scale makes people more content. Yet the poorest 20% of Danes are more joyful than the richest Greeks. According to The Economist.