3North, D. (1990) Institutions, Institutional Change and Economic Performance (Political Economy of Institutions and Decision). Cambridge University Press, Cambridge.
4Hobbs, J.E. and Kerr, W.A. Costs/benefits of microbial origin, Encyclopedia of Food Microbiology, in Robinson. R. and Patel. P(Eds) Academic Press, London, UK, 480-486,1999.
5Akerlof, G.A. The market for "Lemon": qualitative uncertainty and the market mechanism, Quarterly Journal of Economics, 84, 488, 1970.
6Hobbs, J.E. A transaction cost analysis of quality, tractability and animal welfare in UK beef retailing, British Food Journal, 98(6), 16,1996.
7Roberts D., Orden D., Josling T. (1999a) A Framework for Analyzing Technical Trade Barrier in Agricultural Market. Market and Trade Economics Division, U. S Department of Agriculture. Technical bulletin No. 1876.
