是不是無論做甚麼事情都有機會成本呢?

the answer is ''yes''
現在假設你用十分鐘去玩電腦,但你亦可用這十分鐘去做運動,
那麼照這想法去推斷,無論那十分鐘拿來做甚麼事情,都會存在
機會成本了,對嗎????
the above assumption is correct..
no matter what u choose to do...
there are always other things you haven't chosen to do...
then the highest value option foregone would be your opportunity cost.

let's take an example...
this is the list of what u want to do...according to your preference
1) playing computer
2) watching tv
3) doing hw

if u choose (1)...then your opportunity cost would be the (2)
if u choose (2) or (3)....since (1) has the highest value from your point of view...
then (1) woudl then become your opportunity cost..

hope u would understand~
:]

2007-10-04 19:11:08 補充：
it should be impossiblesince people's wants are unlimited, but the resources are limited...therefore, everyone have to make choices everyday. for choosing to do what , meanswhile giving up other choices.

2007-10-04 19:11:20 補充：
hence, when u make a choice , no matter it is free of charge or it has a very high value to u, there is still an opportunity cost for giving your second choice.

經濟的第一課就是先要學機會成本
引用機會成本,可以幫你解釋到好多人類的行為
可以解釋到點解你用十分鐘打機而唔運動
(因為它對你黎講打機價值高 d)
但係如果把時間算埋入機會成本裡面,又解釋到 d 咩?

就算一個人不做任何事情,時間仍然會過的
那他付出過什麼嗎?

機會成本是選擇的成本
如果你沒有選擇便不會有成本，很難出現沒有選擇的條件，因為一些自我控制的範圍，都應有選擇條件，亦會有成本上的差異，所以自我有選擇的成本，除非不是自我的決擇。
自我選擇的情況下，我就想不出了。

對,因為付出時間的時候,你便可以利用那時候去做其他事,
可以做其他事,便會有機會成本的問題,,