How is the long-run average cost curve (LRAC) derived?

长期平均成本曲线是怎么样得到的？

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It is proved that an optimal stationary policy exists under the criterion of long-run average cost.

在平均费用准则下，证明了最优平稳策略的存在性。

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We prove that the long run cost function is a power function of output, and point out the special relationship between long run marginal cost function and long run average cost function.

文章研究一般性齐次生产函数条件下长期成本函数的确定方法，证明了长期成本函数是关于产量的幂函数，并指出了长期边际成本函数和长期平均成本函数之间的特殊关系。

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When Bismarck introduced the world's first state pension system in 1889, he set the retirement age at 70, some 25 years beyond the average Prussian's life expectancy, so it did not cost much to run.

ECONOMIST: The gods that have failed��so far