What makes workers happy? Here we argue that pure 'rank' matters. It is currently believed that wellbeing is determined partly by an individual's absolute wage (say, 30,000 dollars a year) and partly by the individual's relative wage (say, 30,000 dollars compared to an average in the company or...

The paper provides evidence that happiness raises productivity. In Experiment 1, a randomized trial is designed. Some subjects have their happiness levels increased, while those in a control group do not. Treated subjects have 12% greater productivity in a paid piece-rate Niederle-Vesterlund...