analyses of the type employed by Christakis and Fowler will still yield valid tests of the null of no social contagion, even … additional period, then under the null of no contagion, the problems of model inconsistency and statistical dependence … effectively disappear which allow for testing for contagion. Our results clarify the setting in which even "flawed" social network …

hypotheses on proximity-based contagion and status-based convergence mechanisms and test them in the context of the comic book …