What Doesn’t Kill You Makes You Weaker
利用20世纪80年代初工业衰退对空气悬浮颗粒物（TSP）的冲击，研究发现出生年份TSP浓度降低一个标准差，高中考试成绩提高2%（OLS）或6%（IV），并讨论了迁移和母亲选择的影响。
I examine the impact of prenatal total suspended particulate (TSP) exposure on educational outcomes using county-level variation in the timing and severity of the industrial recession of the early 1980s as a shock to ambient TSPs (similar to Chay and Greenstone 2003b). I then instrument for pollution levels using county-level changes in relative manufacturing employment. A standard deviation decrease in TSPs in a student’s year of birth is associated with 2 percent of a standard deviation increase in high school test scores for OLS and 6 percent for IV. I also consider how migration and selection into motherhood relate to my results.