2UDRY C.Risk and saving in Northern Nigeria[J].American Economics Review,1995(5):1287-1300.
3PANDEY S,BEHURA D D,VILLANO R,et al.Economic cost of drought and farmers' coping mechanisms:a study of rainfed rice systems in Eastern India,Discussion Paper No.39[R].International Rice Research Institute,2000.
4WILHITE D A.Planning for drought:a methodology drought assessment,management,and planning:theory and case studies[M].Dordrecht:Kluwer Academic Publishers,1993:87-108.
5LI K,LIN X.Drought in China:present impacts and future needs[M].Dordrecht:Kluwer Academic Publishers,1993:263-289.
6MORDUCH J.Income smoothing and consumption smoothing[J].Journal of Economic Perspectives,1995,3 (9):103-114.
7HOLZMAN R,JORGENSEN S.Social protection as social risk management:a new conceptual framework for social protection and beyond[J].International Tax and Public Finance.,2001,8(4):526-556.
8DEVEREYX S.Informal safety nets in Malawi[R].Brighton:Institute of Development Studies,1999.
9SIMPSON E.Measurement of diversity[J].Nature,1949(163):688.
