Diffusion at sub-national levels: A regional analysis of new product growth
研究了美国次国家单位间创新扩散率的差异，发现彩电和录像机的区域扩散率与购买力、年龄和流动性相关，为扩散理论提供了空间维度视角。
Nearly all studies of diffusion in the business literature focus attention on the rate of diffusion over time. In contrast, William Redmond draws our attention to spatial dimensions of innovation diffusion. His research examines sub-national units within the U.S. for differences in diffusion rates and relates there differences to relevant variables representing socioeconomic characteristics. Sales data on color TV and VCRs reveal differences in regional diffusion rates; these differences are associated with purchasing power, age, and mobility. This approach extends diffusion research into spatial dimensions and has implications for both adoption and diffusion theories.