the innovation simply is "culturally unacceptable." Simultaneously, outside observers may have their own reasons for being satisfied with an answer of cultural unacceptability, and may fail to probe additional factors. Research on extension systems does show that farmers who have extensive contact with extension agents are more likely to adopt new farming methods.1 Correlation, however, does not prove causation. The larger market-oriented farmer can afford to be more innovative, and is also more likely to seek extension services. The correlation between extension contact and adoption sometimes is highest in cases where an 2 innovation is not particularly profitable. In such cases some farmers are willing to follow (for a brief period, at least) the advice of an extension agent perhaps because he is an effective salesman, perhaps to endear themselves to the extension agent and obtain more profitable favors in the future. In at least one case, farmers with more extension contact had lower yields, although the direction of causation is not clear. Everett Rogers, Joseph Ashcroft, and Niels Roling, Diffusion of Innovations in Brazil, Nigeria, and India (East Lansing: Michigan State University, 1970). 2This has been demonstrated clearly with data on short-term adoption rates of fertilizer in different regions of Ethiopia. Bisrat Aklilu, "Technological Change in Subsistance Agriculture: The Adoption and Diffusion of Fertilizer in Ethiopia's Minimum Package Areas," Ph.D. dissertation, Boston University, 1976, pp. 233-234. David Leonard points out that extension agents and some farmers can have patron-client relationships. The agent needs a farmer who will try almost anything so that he can assure superiors that he is managing to arrange some adoption. For the farmer, doing the favor of adopting new techniques for the agent may assure access to credits, market infor- mation, educational opportunities, etc. which may have long-term payoffs far greater than the losses incurred due to unprofitable innovations. 4Uma Lele, The Design of Rural Development, p. 71.