Happiness and Productivity
通过四项实验（包括随机干预和现实冲击）发现，幸福感提升可使计件工人的生产率提高约12%，而幸福感下降则与生产率降低相关，证实了幸福感与工作绩效之间的因果关系。
Some firms say they care about the well-being and ‘happiness’ of their employees. But are such claims hype, or scientific good sense? We provide evidence, for a classic piece-rate setting, that happiness makes people more productive. In three different styles of experiment, randomly selected individuals are made happier. The treated individuals have approximately 12% greater productivity. A fourth experiment studies major real-world shocks (bereavement and family illness). Lower happiness is systematically associated with lower productivity. These different forms of evidence, with complementary strengths and weaknesses, are consistent with the existence of a causal link between human well-being and human performance.