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Innovation diffusion in heterogeneous populations: contagion, social influence, and social learning
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Innovation diffusion in heterogeneous populations: contagion, social influence, and social learning
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Journal Article
Innovation diffusion in heterogeneous populations: contagion, social influence, and social learning
2009
Overview
New ideas, products, and practices take time to diffuse, a fact that is often attributed to some form of heterogeneity among potential adopters. This paper examines three broad classes of diffusion models-contagion, social influence, and social learning-and shows how to incorporate heterogeneity into each at a high level of generality without losing analytical tractability. Each type of model leaves a characteristic \"footprint\" on the shape of the adoption curve which provides a basis for discriminating empirically between them. The approach is illustrated using the classic study of Ryan and Gross (1943) on the diffusion of hybrid corn.
