transfer. In a second model, altruism is impure as the parents want the child to behave in a certain way: exchange and …-altruistic setting, with imperfect credit market, transfers to children and to old parents correspond to a reciprocity contract and are … market substitute. These features explain why the network of reciprocities can be large both in time and space, why those …

this study is to explore the role of social exchange in the outcomes of early-stage innovation collaborations. More … specifically, we explore the social facilitators of exchange and how such facilitators may influence collaboration outcomes. Social … exchange theory is used for this purpose. This longitudinal study is based on a 3-year collaboration project for innovation …

–Gibbs distribution with additive exchange and condenses with a multiplicative one. If bankruptcy is introduced, both types of exchange … lead to condensation. Condensation times have been studied. In the second part, the agents are placed in a social network … values of network connectivity. …

Trust, trustworthiness and ethical norms of reciprocity and cooperation have been receiving more and more attention in …

. We relate bloggers' activity with the size and structure of their network of fellow bloggers. A blogger's readership …

altruism, directed altruism, sanction aversion, and reciprocity. The study area is located on the periphery of the Metropolis …: preference-related motives (baseline and directed altruism) and incentive-related motives (sanction aversion and reciprocity) for …