The Effect of Coal-Fired Power Plant Closures on Emergency Department Visits for Asthma-Related Conditions Among 0- to 4-Year-Old Children in Chicago, 2009-2017

Objectives. To investigate the effects of coal-fired power plant closures on zip code-level rates of emergency department visits for asthma-related conditions among 0- to 4-year-old children in Chicago, Illinois.Methods. We used data on wind, population, PM_2.5 (particulates measuring ≤ 2.5 µm in diameter), and zip code-level rates of emergency department visits for asthma-related conditions among 0- to 4-year-old children between 2009 and 2017 in Chicago. The difference-in-differences research design compared rates of emergency department visits in zip codes near 3 coal-fired power plants before and after their closures to rates in zip codes farther away during the same time period.Results. We found that emergency department visits for asthma-related conditions among 0- to 4-year-old children decreased by 12% in zip codes near the 3 coal-fired power plants following their closures relative to rates in zip codes farther away during the same period. The crude and age-specific rates of emergency department visits decreased by 2.41 visits per ten thousand inhabitants and 35.63 visits per ten thousand children aged 0 to 4 years, respectively.Conclusions. Our findings demonstrate that closing coal-fired power plants can lead to improvements in the respiratory health of young children.

Public health regulation and mortality: Evidence from early 20th century milk laws

In this paper, I estimate the impact of city-level public health regulations in the market for cow's milk on the mortality of infants and young children between 1900 and 1920. I find that the introduction of city-level dairy farm inspections reduced mortality from Diarrhea & Enteritis for one-year-old children by 1.3 annual deaths per thousand, a 14 percent effect relative to the baseline rate for this cause and a 3 percent effect relative to the baseline rate for all causes for this age group. Back-of-the-envelope calculations reveal that the benefits from these regulations exceeded costs by at least a factor of two.