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: Conservation and Environmental Exposure Location: D-106 Session Chair: Jaey Vallapurackal, Leipzig University | |
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Seasonal Gasoline Regulation, Air Quality, and Welfare 1: University of Chicago, USA; 2: University of Illinois at Urbana-Champaign, USA US regulators employ summer-only gasoline volatility restrictions to attenuate the formation of ozone. This paper reexamines the impacts of such regulations on air quality and welfare, advancing prior literature by studying particulate matter effects alongside ozone. We leverage high-frequency, spatially detailed data and apply parsimonious polynomial seasonal adjustments and flexible non- parametric controls for weather, featuring temperature, precipitation, lags, and historical patterns. Complementing whole-year OLS regressions, we introduce a two-stage event-study approach that de-seasonalizes pollution time series before analyzing discontinuities around annual policy phase-ins and phase-outs, with robust controls. For the RVP Phase II program, whole-year regressions indicate summer volatility restrictions reduce ozone concentrations by 2.9%, while event-study type models suggest a 2.1% decline. In a possible adverse unintended consequence, we find the same regulations increase PM10 concentrations by 3.6% (whole year models) to 11.6% (event study models). Net mortality effects are subject to uncertainty, but are projected to be adverse most likely. We recommend these policies be further evaluated. | |