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Analyzing the Relationship Between Bus Pollution Policies and Morbidity Using a Quasi Experiment

September 2015

Nicole S. Ngo


This quasi-experiment examines the effect of state regulation of bus pollution on respiratory disease. Researchers compare emergency room visits for respiratory illnesses for patients living within several hundred feet of a bus route. Findings conclude that strict federal regulation of bus emissions was significantly correlated with reduced emergency room visits.

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Policy Implications

These findings suggest that reducing pollution is an important mechanism for improving public health. Specifically, regulating emission standards for public busses may significantly reduce respiratory disease.

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