Cropper, Maureen L.; Muller, Nicholas Z.; Park, Yongjoon; … - National Bureau of Economic Research - 2022
effects, county population, employment, and per capita income. The average treatment effect is 10.2 μg/m3 using the 1969 panel … and 9.1 μg/m3 using the 1971 panel. Using the definition of nonattainment in the literature yields similar, albeit smaller …, average treatment effects: 6.0 μg/m3 using the 1969-78 panel and 7.7 μg/m3 using the 1971-78 panel …