This paper sets out a theory of how openness to international goods markets affects pollution concentrations. We develop a theoretical model to divide trade's impact on pollution into scale, technique and composition effects and then examine this theory using data on sulfur dioxide concentrations from the Global Environment Monitoring Project. We find international trade creates relatively small changes in pollution concentrations when it alters the composition, and hence the pollution intensity, of national output. Our estimates of the associated technique and scale effects created by trade imply a net reduction in pollution from these sources. Combining our estimates of scale, composition and technique effects yields a somewhat surprising conclusion: freer trade appears to be good for the environment.
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Paper provided by UBC Department of Economics in its series UBC Departmental Archives with number
98-11.
Find related papers by JEL classification: F10 - International Economics - - Trade - - - General O13 - Economic Development, Technological Change, and Growth - - Economic Development - - - Agriculture; Natural Resources; Environment; Other Primary Products
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