A Correlation

From Shot in the Dark, comes mention of a study indicating a correlation between media coverage of mass shootings and subsequent mass shootings:

Our findings consistently suggest a positive and statistically significant effect of coverage on the number of subsequent shootings, lasting for 4-10 days. At its mean, news coverage is suggested to cause approximately three mass shootings in the following week, which would explain 55 percent of all mass shootings in our sample. Results are qualitatively consistent when using (i) additional keywords to capture shooting-related news coverage, (ii) alternative definitions of mass shootings, (iii) the number of injured or killed people as the dependent variable, and (iv) an alternative, longer data source for mass shootings from 2006-2016.

Three more shootings the following week? Fifty-five percent of all mass shootings in the sample?

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