The impacts of openness on air quality in China

This paper investigates how openness resulting from the adoption of the open-door policy influences air quality in urban China. City-level information is used to minimise the impacts of data inconsistency and data measurement problems. The intensity of international trade is used as a proxy for openness to examine how freer trade influences urban air quality. Several alternative measures of openness are adopted to investigate how different forms of openness can influence urban air quality. Our findings show that technique effects are the key to reversing the degradation of urban air quality and that openness is not necessarily a problem for urban air quality in China.