Regression Analysis of Recruitment-Associated Factors
Two-part, alter-egos
REGRESSION, RECRUITMENT
Two-part models were fitted to estimate correlates of alters who had successfully enrolled. In the first part, a logistic regression model was used to estimate the probability of alters who successfully enrolled among those to whom egos had forwarded e-reports. In the second part, for egos that successfully recruited alters, the number of alters recruited was estimated using ordinary least squares regression. In addition, factors associated with e-report delivery were analyzed using logistic regression. As a relatively small percentage of alters transformed into alter-egos in the subsequent recruitment waves, Firth’s penalized likelihood [