A pervasive problem in the literature on the health costs of pollution is that optimizing individuals may compensate for increases in pollution by reducing their exposure to protect their health. This implies that estimates of the health effects of pollution may vastly understate the full welfare effects of pollution, particularly for individuals most at risk who have the greatest incentive to adopt compensatory behavior. Furthermore, using ambient monitors to approximate individual exposure to pollution may induce considerable measurement error. We overcome these issues by estimating the short run effects of ozone on respiratory related health conditions using daily boat arrivals and departures into the two major ports of Los Angeles as an instrumental variable for ozone levels. While daily variation in boat traffic is a major contributor to local ozone pollution, time-varying pollution due to port activity is arguably a randomly determined event uncorrelated with factors related to health. Instrumental variable estimates are significantly larger than OLS estimates, indicating the importance of accounting for avoidance behavior and measurement error in understanding the full welfare effects from pollution.
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
14939.
Length: Date of creation: May 2009 Date of revision: Handle: RePEc:nbr:nberwo:14939
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Find related papers by JEL classification: I12 - Health, Education, and Welfare - - Health - - - Health Production I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health Q53 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Air Pollution; Water Pollution; Noise; Hazardous Waste; Solid Waste; Recycling
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