My recent work has focused largely on trade and environment issues in developing countries. In a series of empirical studies using Chinese data, I’ve been exploring the possibility that trade growth may be beneficial for the environment, that foreign investors may create pollution havens in poor countries, and, most recently, that foreign investment and production fragmentation may have beneficial effects on the environment. In other work on fragmentation, I’ve been studying the variation in vertical specialization in Chinese trade. I also continue my work on trade restrictions and economic development, with a new focus on NTBs and on trade preference erosion.