<P>求以下三篇文献，急用。不胜感激！</P>
<P>1、B. Copeland, International trade and the environment: policy reform in a polluted small open economy,<BR>Journal of Environmental Economics and Management， 26 (1994) 44–65.</P>
<P>2、K. Krutilla, Environmental regulation in an open economy, Journal of Environmental Economics and Management， 20 (1991) 127–142.</P>
<P>3、G.E. Helfand, Standards versus Standards; the effects of different pollution standards, <FONT size=2>American Economic Review，</FONT> 81 (1991)622–634.</P>
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<P align=right><FONT color=#000066>[此贴子已经被作者于2008-8-26 15:19:03编辑过]</FONT></P>