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Analyzing Diffusion and Contagion Effects: The Urban Disorders of the 1960s

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  • Midlarsky, Manus I.

Abstract

This study concerns the analysis of diffusion and contagion processes using a lognormal model of overdispersion phenomena. The urban disorders of the past decade are examined and two processes are found to exist in the 1966–67 period. One is a classic diffusion effect in which disorders are precipitated by events which are independent of each other, but lead to outcomes such as numbers of arrests which are proportional to previous disorders. The second process is a contagious one in which disturbances occur as a consequence of smaller cities imitating the behavior of large ones experiencing a disorder. It was found that the explanatory power of the interaction effect between police and black city residents tended to increase as city size increased. Concomitantly, the effects of environmental variables tended to decrease in explanatory power as city size decreased.

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  • Midlarsky, Manus I., 1978. "Analyzing Diffusion and Contagion Effects: The Urban Disorders of the 1960s," American Political Science Review, Cambridge University Press, vol. 72(3), pages 996-1008, September.
    • Handle: RePEc:cup:apsrev:v:72:y:1978:i:03:p:996-1008_15
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    Cited by:

    1. Rodger M. Govea & Gerald T. West, 1981. "Riot Contagion in Latin America, 1949-1963," Journal of Conflict Resolution, Peace Science Society (International), vol. 25(2), pages 349-368, June.
    2. Campedelli, Gian Maria & D'Orsogna, Maria Rita, 2021. "Temporal Clustering of Disorder Events During the COVID-19 Pandemic," OSF Preprints fuhqw, Center for Open Science.
    3. Gian Maria Campedelli & Maria Rita D'Orsogna, 2021. "Temporal Clustering of Disorder Events During the COVID-19 Pandemic," Papers 2101.06458, arXiv.org, revised Apr 2021.
    4. Li, Siyu & Zhao, Xiande & Huo, Baofeng, 2018. "Supply chain coordination and innovativeness: A social contagion and learning perspective," International Journal of Production Economics, Elsevier, vol. 205(C), pages 47-61.
    5. Zachary Elkins & Beth Simmons, 2005. "On Waves, Clusters, and Diffusion: A Conceptual Framework," The ANNALS of the American Academy of Political and Social Science, , vol. 598(1), pages 33-51, March.

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