a discussion of the link of such taxation with agricultural development and poverty, World Development Report, 1990: Poverty, Oxford University Press, pp 56-58. 3 For the most important recent studies, see Henk Hobbelink, Biotechnology and the Future of World Agriculture, Zed Books, London, 1991 and The Laws of Life: Another Development anfl the New Biotech nofogies', special issue of Development Dialogue, 1988: 1-2. 4 Karl Marx, Capital, Volume 3 International Publishers, New York 1967) pp 631, 617.