Interpretations of parameters in cluster-mean centered self-included model and self-excluded model.

aAs explained in the main text, yij is an observed outcome of individual i in group j and xij is an individual-level social capital score of individual i in group j. Furthermore, is a self-included measure that denotes the mean of social capital scores of all individuals in group j. It is calculated as , where nj is the size of group j. Similarly, is a self-excluded measure denoting the mean of social capital scores of all individuals excepting individual i in group j, calculated as .