4Iowa State University:Revenue Protection Crop Insurance[ R ]. United States Department of Agriculture, September,2014.
5Gary Schnitkey: Area Risk Protection Insurance Policy : Comparison to Group Plans [ R ]. Department of Agricultural and Consumer Eco- nomics University of Illinois, January 7,2014.
6USDA. Area Risk Protection Insurance [ R ]. United States Depamnent of Agriculture, June,2014.
10B. Goodwin (2011 ) :Current Issues in Modeling Yield and Price Risk:Implications for the Design and Rating of Crop Insurance Contracts. 2011 workshop of the ERCA Research Network on the Structure and Performance of Agriculture and gri-Products Industry (SPAA).