My own research has documented the connection between a large-scale presence of the creative class of workers -- people who work in science and technology; business and management; arts, culture and entertainment; medicine and education -- and the prosperity of cities. But it's about more than prosperity. Once a certain threshold of income is met, our research finds, the work people do plays a substantial role in their happiness, over and above the effect of income at the national6, state7, and city8 levels. Our findings here reinforce and confirm this conclusion. There is a substantial positive correlation between city happiness and the share of creative class jobs (.5) and a significant negative one between well-being and the share of working class jobs (-.4).