5Andy Jerardo, Import share of food consumption of U.S. Stable at 11 percent, Electronic Outlook report from the Economic research service, www.ers.usda.gov.
7UNEP. Element of Policies for Sustainable Consumption[M]. Nairobi,1994.
8Sen, A.. Goals, Commitment, and Identity [J]. Journal of Law, Economics and Organization, 1985, (1):341-55.
9Van den Bergh, Ada Ferrer-i-Carbonell, Giuseppe Methods: Altrnative Models of Individual Behaviour and Implications for Environmental Policy[J]. Ecological Ecological Economics ,2000,(32):43-61.
10Gintis, H.. Beyond Homo Economicus:Evidence from Experimental Economics[J]. Ecological Economics,2000,(35):311-322.
