【1】The Measurement of Productive
   Efficiency: A Reconsideration

Raymond John Kopp
   

The Quarterly Journal of Economics, 1981, vol. 96, issue 3, pages 477-503

【2】Kaneko  Water Efficiency of Agricultural Production in China: Regional Comparison from 1999 to 2002·International Journal ofAgricultural Resources, Governance and Ecology, 2004, Vol·3: 231~251

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[此贴子已经被作者于2009-5-24 21:23:35编辑过]