Much recent work on agricultural development has been devoted to shedding light on the mechanisms by which improved agricultural technology is generated and diffused. Earlier studies of the sources of growth identified the need for a constant stream of innovations responsive to the farm environment as the basis for sustained growth in the rural sector.[ 1 ] But the discussion of the means by which “markets” emerge or “feedback loops” between demanders and suppliers of technology are created, was descriptive rather than analytical.