5Roger W Gray . The Prospects ibr Trading in Live Hog Futures[J]. Futures Trading In Livestock, 1970 : 125 - 132.
6Hartmann P A. The forward-pricing efficiency of the live-hog fu- tures market. [J]. Dissertation Abstracts International,1980: 332.
7Laura L Martin. Production Con-tracts, Risk Shifting and Relative Performance Payments in the Pork Industry [ J ] .Journal of Agricul- ture and Applied Economies, 1997( 12 ) :267-278.
8Raymond M Leuthold, Philip Garcia, Nabil Chaherli. Information, Pricing and Efficiency in Cash and Futures Markets:The Case of Hogs [ J ].Economic Record, 1992 ( 12 ) : 27-33.
9Colin A Crter, Sandeep Mohapatra. How reliable are hog futures as forecasts? [ J ] American Journal of Agricultural Economics, 2008 ( 2 ) : 367-378.
