giving with the expectation of a straightforward immediate or limited-time trade
a system of required labor
gift giving without any immediate or planned return
a universally accepted medium of exchange
market or commercial exchange
transactions in which the "prices" are subject to supply and demand, whether or not the transactions occur in a marketplace
optimal foraging theory
the theory that individuals seek to maximize the returns "in calories and nutrients" on their labor in deciding which animals and plants that they will go after
Rural people who produce food for subsistence but who must also contribute or sell their pluses to others in towns and cities who do not produce their own food.
feast among Pacific Northwest Native Americans at which great quantities of food and goods are given to the guests in order to gain prestige for the host.
giving and taking (not politically arranged) without the use of money
the accumulation of goods (or labor) by a particular person or in a particular place and their subsequent distribution
objects of value for which only some goods and services can be exchanged