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Utility possibility frontier


The maximum attainable levels of utility for the consumers in an economy given the economy’s endowment and technology. The utility possibility frontier can be constructed by taking each Pareto-efficient allocation and plotting the utility levels of the consumers at that allocation. Varying the allocation traces out the frontier. A point below the frontier is not Pareto efficient. The social optimum is the point on the frontier that maximizes a chosen social welfare function.

Reference: Oxford Press Dictonary of Economics, 5th edt.