  This paper shows how we can build a model for transactions when goods are
given away in the expectation of a later settlement. In settings where people
keep track of their social accounts we are able to redefine concepts like
account balance, yield curve and the law of diminishing returns. The model
provides us with a result that expresses how people have a structural
preference for one recipient over the other regardless the actual account
balance. Hence a building block in the social fabric of a community. Finally, a
fundamental theorem is presented to show how suppliers and recipients use their
account balance in order to reach an equilibrium in the exchange of goods much
like the traditional balance between supply and demand.
