Budget-additive valuation
In economics, a budget-additive valuation is a kind of a utility function. It corresponds to a person that, when given a set of items, evaluates them in the following way: Budget-additive valuations are useful in the research of online advertising, combinatorial auctions, resource allocation, and market equilibrium. Relation to other kinds of valuations. Every additive valuation is a special case of a budget-additive valuation, in which the budget is infinite. Every budget-additive valuation is a submodular valuation.