Social contagion and income heterogeneity in new product diffusion: a meta-analytic test

Social contagion and income heterogeneity in new product diffusion: a meta-analytic test

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Article ID: iaor20061603
Country: United States
Volume: 23
Issue: 4
Start Page Number: 530
End Page Number: 544
Publication Date: Sep 2004
Journal: Marketing Science
Authors: ,
Keywords: behaviour, innovation
Abstract:

Standard diffusion models capture social contagion only coarsely and do not allow one to operationalize different contagion mechanisms. Moreover, there is increasing skepticism about the importance of contagion and, as has long been known, S-shaped diffusion curves can also result from heterogeneity in the propensity to adopt. We present hypotheses about conditions under which specific contagion mechanisms and income heterogeneity are more pronounced, and test these hypotheses using a meta-analysis of the q/p ratio in applications of the Bass diffusion model. The ratio is positively associated with the Gini index of income inequality in a country, supporting the heterogeneity-in-thresholds interpretation. The ratio also varies as predicted by the Gamma-Shifted Gompertz diffusion model, but the evidence vanishes after controlling for national culture. As to contagion, the q/p ratio varies with the four Hofstede dimensions of national culture – for three of them in a direction consistent with the social contagion interpretation. Furthermore, products with competing standards have a higher q/p ratio, which is again consistent with the social contagion interpretation. Finally, we find effects of national culture only for products without competing standards, suggesting that technological effects and culturally moderated social contagion effects might not operate independently from each other.

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