Mauss' views on the nature of gift exchange have had critics. French anthropologist Alain Testart (1998), for example, argues that there are "free" gifts, such as passers-by giving money to beggars, e.g. in a large Western city. Donor and receiver do not know each other and are unlikely ever to meet again. In this context, the donation certainly creates no obligation on the side of the beggar to reciprocate; neither the donor nor the beggar have such an expectation. Testart argues that only the latter can actually be enforced. He feels that Mauss overstated the magnitude of the obligation created by social pressures, particularly in his description of the potlatch amongst North American Indians.