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:[1] Budget-additive valuations are useful in the research of online advertising,[2][3][4] combinatorial auctions,[5][6] resource allocation,[7][8][9][10][11] and market equilibrium.
[12][13][14][15] 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.