Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
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Daily Overview |
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Egg-Timer: Environmental Impacts and Development Location: D-112 Session Chair: Sukanya Mukherjee, IWH Halle Germany | |
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Effectiveness and Distributional Impacts of Environmental Regulation: Evidence from the National Clean Air Program in India University of Massachusetts Amherst, United States of America India launched the National Clean Air Program (NCAP) in 2019 as a major policy initiative aimed at reducing particulate pollution in severely affected cities. This paper evaluates the effect of NCAP on PM2.5 concentrations using a matched, difference-in-differences identification strategy with high-resolution, daily PM2.5 data. I find that between 2021 and 2023, NCAP failed to significantly reduce average PM2.5 levels or the number of days exceeding the Indian guideline for ambient air quality. This null average effect, however, hides substantial heterogeneity. I find that sub-districts that had poorer air quality prior to the start of the program have reduced PM2.5 concentrations by an average of 8 percent under NCAP. I also find that PM2.5 concentrations in wealthier sub-districts have declined slightly, but that PM2.5 concentrations in the poorer sub-districts have increased by an average of 6 percent. These results show that aggregate null effects conceal meaningful heterogeneity: NCAP improved air quality where pollution was most severe, but may have worsened conditions for the least affluent. | |