How and why does a firm's average-total-cost curve differ in the short run and in the long run?

为何一个企业的短期平均总成本和长期平均总成本不一致？

youdao

In the long run, the firm exits if the revenue it would get from producing is less than its total cost.

在长期，如果生产的收益小于总成本，企业就会退出市场。

youdao

Does a firm's price equal the minimum of average total cost in the short run, in the long run, or both? Explain.

企业产品的价格在短期等于最低平均总成本还是长期等于最低平均总成本，还是两者都等于？

youdao

Although the transition to such a scheme would be expensive, it would in the long run tackle a third of the total cost of the social security budget, encourage people to put extra savings of their own into their pension schemes and reduce their reliance on the goodwill of younger taxpayers.

ECONOMIST: From Beveridge to Blair