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Trade, expropriation and allocation

By Antonio Quesada


Allocation rules map preference profiles into allocations, whereas trading rules map preference profiles and allocations into allocations. It is shown that no allocation rule can derive from a trading rule based on voluntary trade and satisfying a weak efficiency condition. If the trading rule allows compulsory trade then the only allocation rules that can derive from a trading rule satisfying certain additional mild conditions are those having a hierarchy of dictators. These results contribute to accentuate the difference between centralized and decentralized allocation mechanisms.Allocation rules, Compulsory trade, Hierarchy of dictators, Trading rules

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