The Effect of Subway Openings on Air Quality
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This paper examines the effect of urban rail transport on air quality using the opening of the second subway line in the South Korean metropolitan city of Daegu. Exploiting the discrete increase in subway ridership on the date of opening, I apply a regression discontinuity design to data on the hourly level of the air pollutants. My results show that the opening of a new subway line substantially reduced carbon monoxide and nitrogen dioxide, air pollutants primarily from road transport.
Abstract
This paper examines the effect of urban rail transport on air quality using the opening of the second subway line in the South Korean metropolitan city of Daegu. Exploiting the discrete increase in subway ridership on the date of opening, I apply a regression discontinuity design to data on the hourly level of the air pollutants. My results show that the opening of a new subway line substantially reduced carbon monoxide and nitrogen dioxide, air pollutants primarily from road transport.
참고문헌 (18)
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