Since there is a time dimension involved in the study of the diffusion of technology into small business, similar to other investigations of innovation, theories based on these studies will tend to lag behind the "best " current practice. All models of technology diffusion, including refined models such as the Bass Norton model, are a simplification of reality and , therefore,have a measured influence upon policy. One theoretical model that has informed policies is Centre Periphery Model which rests on three basic assumption -