““Those who came up with the innovations were individuals already active in agriculture who looked deliberately and systematically to improve their businesses; the changes were decentralized, not centralized; and the changes were led by practical men, not by scientists or governments. The innovations involved tinkering, trial and error, or recognizing a new approach and transferring it to a different environment. There are two possible reasons motivating these innovations. The first is that they were supply driven - innovation took place for the sake of innovation, because someone had discovered a new process. The second is that they were demand driven - innovation resulted from the drive by farmers to expand their production and to increase their incomes. The evidence is entirely consistent with the demand-driven hypothesis. The nature and the timing of the innovations all is consistent with the idea that innovation was a response to a problem, the problem being to increase output and/or to reduce costs and so to increase incomes. Innovation was the response to business opportunities, not the cause.””
