中文摘要
麻疹疫苗于1963年问世。该疫苗在美国的接种迅速而普及，带来发病率与死亡率的下降。关于麻疹病毒如何与人体免疫系统相互作用的新生物学证据表明，麻疹疫苗的影响可能被低估。采用双重差分识别策略，我发现有证据表明麻疹疫苗提高了收入与就业。对成年人的长期随访发现收入增长了1.1%，且对就业有正向影响。这一收入增长并非源于工作时间的增加，而是源于生产率的提升。(JEL I12, I18, J22, J24, J31)
Abstract
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. (JEL I12, I18, J22, J24, J31)