4Grossman, G. M. and Krueger, A. Environmental Impacts of A North American Free Trade Agreement[M] .in P. Garber, ed., The U. S . - Mexico Free Trade Agreement,Cambridge MA: MIT Press, 1993,13-56.
5Shafik, N. Economic Development and Environmental Quality: An Econometric Analysis [ Z ]. Oxford Economic Paper, 1994,46 : 757 - 773.
6Selden, T. M. and Song, D. Environmental Quality and Development: is there a Kuznets curve for air pollution emissions? [J] .Journal of Environmental Economics and Management, 1994,27 : 162 - 168.
7Xepapadeas A., Amri E. Environmental quality and economic development: Empirical evidence based on qualitative characteristics[C] .6th Annual Conference of the European Association of Environment and Resource Economists, Sweden, 1995.
8Grossman, G. M. and Krueger, A. Economic Growth and Environment [ J ] . Quarterly Journal of Economics, 1995, 110 : 357 - 378.
9Lopez Ramon. The environment as a factor .of production: The effects of economic growth and trade liberalization[J] .Journal of Environmental Economics and Management, 1994, 1.27 : 185 - 204.