 Economic anthropologists such as Marshall Sahlins, Karl Polanyi, Marcel Mauss and Maurice Godelier have demonstrated that in traditional societies, choices people make regarding production and exchange of goods follow patterns of reciprocity which differ sharply from what the "homo economicus" model postulates.Such systems have been termed gift economy rather than market economy.Criticisms of the "homo economicus" model put forward from the standpoint of ethics usually refer to this traditional ethic of kinship-based reciprocity that held together traditional societies.