The Long-Term Effects of Measles Vaccination on Earnings and Employment
利用双重差分法，发现美国1963年引入的麻疹疫苗使成年人收入提高1.1%，就业率上升，效果源于生产率提升而非工时增加。
The measles vaccine was introduced in 1963. Take-up of the vaccine in the United States occurred quickly and universally, leading to reductions in morbidity and mortality. New biological evidence on how the measles virus interacts with our immune system indicates the impact of the measles vaccine may be underestimated. Using a difference-in-difference identification strategy, I find evidence the measles vaccine increased earnings and employment. Long-term follow-up of adults finds an increase in income of 1. 1 percent and positive effects on employment. This increase in income is not from an increase in hours worked but rather from greater productivity.