Judith Dean

Trade growth for a relatively poor country is thought to shift the composition of industrial output towards dirtier products, aggravating environmental damage. China's rapidly growing trade and serious environmental degradation appear to be no exception. However, much of China's trade growth is attributable to the international fragmentation of production. This kind of trade could be cleaner, if fragmented production occurs in cleaner goods, or if China specializes in cleaner stages of production within these goods. Using Chinese official environmental data on air and water pollution, and official trade data, we present evidence that (1) China's industrial output has become cleaner over time, (2) China's exports have shifted toward relatively cleaner, highly fragmented sectors, and (3) the pollution intensity of Chinese exports has fallen dramatically between 1995 and 2004. We then explore the role of fragmentation and FDI in this trend toward cleaner trade. Beginning with a standard model of the pollution intensity of trade, we develop a model that explicitly introduces production fragmentation into the export sector. We then estimate this model using pooled data on four pollutants over ten years. Econometric results support the view that increased FDI and production fragmentation have contributed positively to the decline in the pollution intensity of China's trade, as has accession to the WTO and lower tariff rates.

In recent debates, trade preference erosion has been viewed by some as damaging to developing countries, and by others as insignificant, except in a few cases. But little data have been available to back either view. The objective of this paper is to improve our measures of the size, utilization, and value of all U.S. nonreciprocal trade preference programs in order to shed light on this debate. Highly disaggregated data are used to quantify the margins, coverage, utilization, and value of agricultural and nonagricultural tariff preferences for all beneficiary countries in the U.S. regional programs and in the Generalized System of Preferences. Results show that U.S. regional tariff preference programs are generally characterized by high coverage of beneficiary countries'exports, high utilization by beneficiary countries, and low tariff preference margins (except on apparel). For 29 countries, the value of U.S. tariff preferences was 5 percent or more of 2003 dutiable exports to the United States, even after incorporating actual utilization. Most of this value is attributable to nonagricultural tariff preferences, and to apparel preferences in particular. These results suggest that preference erosion may be significant for more countries than many had thought.