# 很急，請幫我翻譯… 20點 今天晚上就要了-2拜託

Our analysis of the firm's shutdown decision is one example of the irrele-vance of sunk costs. We assume that the firm cannot recover its fixed costs by temporarily stopping production. As a resuly, the firm's fixed costs are sunk in the short run, and the firm can safely ignore these costs when deciding how much to produce. The firm's short-run supply curve is the part of the marginal-cost curve that lies above average variable cost , and the size of the fixed cost does not matter for this supply decision.

The irrelevance of sunk costs is also important when making personal decisions. Imagine, for instance, that you place a \$10 value on seeing a newly released movie. You buy a ticket for \$7, but before entering the theater,you lose the ticket. Should you buy another ticket? Or should you now go home and refuse to pay a total of \$14 to see the movie? The answer is that you should buy another ticket. The benefit of seeing the movie (\$10) still exceeds the opportunity cost (the \$7 for the second ticket). The \$7 you paid for the lost ticket is a sunk cost. As with spilt milk, there is no point in crying about it.

Rating

我們對於企業的歇業決策便是沉入成本(sunk cost)無關性的例子之一。我們假定企業無法用暫時性的停止生產來彌補他的固定成本，由於該企業的固定成本在短期看來是為沉入成本，而且企業可以決定生產費用時即可安心地忽視這些成本。平均變動成本以上的邊際成本曲線為廠商短期供給曲線，因此固定成本的多寡並不影響廠商的供給決策。

沉入成本無關性同時也對於個人決策相當重要。試想，如果你去看一部最近剛上映有10元價值的電影，你花7元買票，但是在進入戲院前，你的票弄丟了。你應該再買一張票嗎？或者你現在應該回家拒絕花總價14元看該電影？答案是你應該再買一張票。看這部電影的好處(\$10)仍然超過機會成本(第二張7元的票)。你已付7元買的第一張電影票便是沉入成本。就像已潑灑出來的牛奶，沒有必要為此傷心哭泣。

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經濟學是很久以前學的了，忘了很多，怕翻得不是很好，希望以上對您有幫助！以下是我查到奇摩知識上對於sunk cost的解釋，您可參考看看 --

進入者如果已經進入之後，現存廠商想再把進入者趕出市場，所要耗費的成本可能會遠超過和進入者分享利潤的成本，這是因為進入成本已經是沈入成本（sunk cost），進入者不會考慮到沈入成本，因此會戰到最後一兵一卒，造成報復廠商的重大損失。因此，如果進入的沈入成本高，廠商報復的機會也不高。

Source(s): 翻譯是靠自己的大腦，另外對於sunk cost的說明是在這裡http://tw.knowledge.yahoo.com/question/question?qi...