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From Longman Business DictionaryPareto-optimalPa‧re‧to-op‧ti‧mal /pəˌriːtəʊ ˈɒptəməlpəˌreɪtoʊ ˈɑːp-/ adjectiveECONOMICS if available RESOURCEs (=things that you need to make or do something) have been given to people in a Pareto-optimal way, this is the most effective way of using them. In this situation, it is impossible to put one person in a better position by giving them more resources, without putting someone else in a worse position. In practice, resources are rarely given out in a Pareto-optimal wayThe government thinks that the distribution of financial resources is Pareto-optimal because different departments compete for resources.
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