5David B.Audretsch and Stever Klepper(2000),Innovation,evolution of indrstry and economic growth[M].http://spea.indiana.edu/ids/pd-fholder.
6M Yussefi.The world of organic agriculture :Statistics and future prospects 2003[J].http://orgprints.org/id/eprind/544.
7L Lohr. Lnproving extension effectiveness for organic clients:Current status and future directions[J].Journal of Agricultural and Resource Economic,2003,28(3):634-650.
8C Dimitri,L Oberholtzer.EU and U.S.Organic Markets Face Strong Demand Under Different Policies[J].Amber Waves.2006(4):12-19.
9Carriquiry.Reputations,Market Structure,and the Choice of Quality Assurance Systems in the Food Industry[J].American Journal of Agricultural Economics,2007,89(2):12-19.
10B.W. Ang. Decomposition analysis for policymaking in energy:which is the preferredmethod?[J], Energy Policy, 2004, 32: 1131-1139.