The article discusses the contribution of the principle of reciprocity to a socio-anthropology of rural organizations … reciprocity. The first part presents the mobilization of reciprocity in these three approaches. The second part develops a … reciprocity to rural organizations. The conclusion examines the limits of these theories. …

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 …

–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. …