4United States Department of Agriculture. Livestock and Poultry: World Markets and Trade [ EB/OL]. [ 2013 -04 - 17 ]. http:// usda. mannlib. cornell. edu/usda/fas/livestock-pouhry-ma//2010s/2013/livestock-poultry-ma-04-17-2013.pdf.
6Ruiz J, Ventanas J. New device for direct extraction of volatiles in solid samples using SPME [ J]. Journal of Agricultural and Food Chemistry,2001,49(11) :5115 -5121.
7Costa E F, Miller B R, Houston J E, et al. Production and profitability responses to alternative protein sources and levels in broiler rations [ J ]. Journal of Agricultural and Applied Economics,2001,33 ( 3 ) : 567 - 581.
8Shen G. Location of manufactured housing and its accessibility to community services: a GIS-assisted spatial analysis[J]. Socio- Economic Planning Sciences, 2005,39 ( 1 ) : 25 - 41.
9Farrell M J. The measurement of productive efficiency [ J ]. Journal of the Royal Statistical Society: Series A (General) , 1957, 120(3) :253 -290.
10Battese G E, Corelli T J. A model of technical inefficiency effects in stochastic frontier production for panel data[ J]. Empirical Economics, 1995,20 (2) :325 - 332.
