ur issue brings together a set of conceptual and empirical articles around the broad topic of sharing and ownership. Keeping and sharing are not only fundamental to consumer behavior, but these basic interactions “establish the various social ties linking both individuals and groups” (Godelier 2011, 469). Hence, sharing is an active practice that is constitutive of social relations (John 2013). As our ancient Cro-Magnon and Neanderthal ancestors gathered around a fire in the self-interested desire to stay warm, they also formed relations and learned to “cooperate durably in ways not found in themost closely related primate societies” (Godelier 2011, 464). Sharing talk, food, and relations around a fire became something done for its own sake—its own intrinsic value, not involving expectations of reciprocal exchange (Vaughan 1997; Widlok 2013). Sharing is ubiquitous, but often taken for granted and embedded in everyday rituals and routines (Belk 2010). It is sometimes difficult to precisely define and distinguish from market and gift-giving exchanges (Belk 2010, 2014a; Widlok 2013;BardhiandEckhardt2015;Scaraboto2015).Moreover, sharing and ownership are socially constructed, embedded in values, cultural norms, relations, and human emotions; there are often social constraints on sharing and owning, and theremay be social sanctions for not sharing or not owning (John 2013; Siebert 2013). Ownership, access, and sharing are emerging as key concepts across a number of fields and contexts. We are now barraged with information about “the sharing economy” and collaborative consumption that provokes new questions about interplay between keeping and sharing and the consequences for consumers and companies (Chen 2009; Botsman and Rogers 2010; Bardhi and Eckhardt 2012; Lamberton and Rose 2012; Matzler, Veider, Kathan 2015; Scaraboto 2015). Much recent research explores hybrid variants that strive to combine the logics of sharing and market exchange. In some of the theory and research surrounding