Hayami and Ruttan argue that the high-payoff input theory is incomplete because it fails to incorporate the mechanism that induces these new inputs and technologies to be produced in a country. The theory also fails to explain how economic conditions stimulate the development of public agricultural experiment stations and educational systems. It does not attempt to identify the process by which farmers organize collectively to develop public infrastructure such as irrigation and drainage systems. In the next section we explore the induced innovation theory proposed by Hayami and Ruttan to address these issues.