Economic anthropology is a field that attempts to explain human economic behavior in its widest historic, geographic and cultural scope. It is practiced by anthropologists and has a complex relationship with the discipline of economics, of which it is highly critical. Its origins as a sub-field of anthropology began with work by the Polish founder of anthropology Bronislaw Malinowski and the French Marcel Mauss on the nature of reciprocity as an alternative to market exchange. For the most part, studies in economic anthropology focus on exchange. In contrast, the Marxian school known as "political economy" focuses on production.