8KUZNETS S. Economic growth and income inequality[ J]. American Economic Review, 1955,45 ( 1 ) : 1-28.
9GROSSMAN G M, KREUGER A B. Environmental impacts of a North American free trade agreement [R]. Cambridge MA : National Bureau of Economic Research, 1991.
10SHAFIK N. Economic development and environmental quality: an econometric analysis [ J ]. Oxford Economic Papers, 1994,46 : 753-777.
