government over the period 2010 to 2013, to test the joint hypotheses that (1) atmospheric ozone production in the São Paulo … use in the gasoline-ethanol vehicle fleet leads to higher ozone concentrations in urban São Paulo's ambient air. We adopt … a regression discontinuity design (RDD) and flexibly test each discontinuity separately. Our finding that ozone levels …

it a model for other agreements, but its power goes beyond protecting the stratospheric ozone layer. Much of the …

revision and attempted re-revision of the primary NAAQS for photochemical oxidants (ozone), in which two EPA Administrators … perspective on the roles of science and policy in environmental decision making. Drawing on the ozone "rulemakings" as a case … the NAAQS standard-setting process in Part II, Parts III and IV describe the EPA's 2008 revision to the ozone NAAQS and …