The Role of Homophilic Selection in Socioeconomic Homophily: Evidence from a Three-Week Summer Camp

Abstract

Socioeconomic homophily in friendship networks is the result of several co-occuring processes, which are particularly challenging to disentangle. We propose to study the particular context of a three-week summer camp in France that gathered teenagers from varied socioeconomic backgrounds. We argue that this camp provides a unique opportunity to observe the sociability of adolescents in well-bounded settings with equalized meeting opportunities, thus helping us to narrow down the specific role of homophilic selection - the process by which individuals actively select similar friends. We use Stochastic Actor-Oriented Models to analyze the declared friendships of participants. Furthermore, we introduce a novel longitudinal extension of the Exponential Random Partition Model (ERPM), a class of model meant for relational data organized in discrete groups, which we apply to observed meal-sharing among adolescents. Results point to weak to non-existent homophilic selection during the stay. In turn, this suggests that structural opportunities and contextual moderators might be essential in explaining the amount of socioeconomic homophily found at school or in other contexts.

Socio‐economic inequalities in smoking and drinking in adolescence: Assessment of social network dynamics

“…Although opportunities to intervene in friendship formation are limited, interventions could promote more opportunities for different SES to meet and interact, for example, by assigning seating arrangements, groups in introductory meetings and dormitory roommates, or providing outof-school-context meeting opportunities (e.g. summer camps)[65][66][67][68][69]. Future interventions should consider socio-economic differences in social network processes to address not only the overall prevalence of smoking and alcohol consumption but also to close the gap in these respects between affluent and poor adolescents.…”