An economic term to denote the rate at which the optimal value changes with respect to a change in some right-hand side that represents a resource supply or demand requirement (This is sometimes taken as synonymous with the dual price, but this can be erroneous, as in the presence of degeneracy -- see marginal price ) Also see pricing
A "price" used in economic analysis to represent a cost or benefit from a good when the market price is a poor indicator of economic value or there is no market at all for that good