“…Such indices include agricultural cooperatives, banking, communications (telegraph, telephone), educational facilities, electricity, employment patterns across economic sectors, medical services, police organizations, postal agencies, transportation modes (roads, rail), urbanization, and other artifacts of a market economy (Gould, 1976;Pedersen, 1975;Taaffe et al, 1963). One approach involves choosing an index of development, and tracing its spread across the landscape; this approach is similar methodologically to the culture trait studies of earlier diffusion research.…”