會考經濟(07/09/2007) maxtsiumax問

maxtsiumax問: Study the following information carefully: Mr Wong is a lawyer. He rents an office in Central at $10000 per month and employs Mary as his secretary at $8000 per hour. Explain whether Mr Wong's cost of using the office will be changed if he decided to extend his office hours to 7:00 p.m.

經濟友以前响forum已見過類似呢題關於opportunity cost(機會成本)嘅問題, 而睇番同學網上嘅解答, 發現同學有d係concept唔清, 亦有d同學就算concept ok , 但衰冇睇清楚問題而攞0分! 其實最緊要睇cost of “xxx”!

以maxtsiumax條題目為例, 如果問cost of “running”(營運) office, 因為兩粒鐘OT會用多咗電費 (開燈,冷氣,影印機等), 出OT糧俾員工, 所以operating cost (營運成本)會上升。但如果題目係問cost of “using”(使用) office, 同學應該諗吓間office响果兩粒鐘有冇alternative uses (其他用途), 如果冇嘅話, 即係冇選擇, 冇選擇即冇嘢要放棄, 所以冇成本 (no choice, no cost!) 但如果有嘅話, 譬如OT果兩粒鐘原本可用嚟開法律課程, 咁OT嘅話就開唔到法律課程, 即犧牲果堂賺到嘅學費 (tuition fee forgone), 所以有成本。

同學答咗「成本上升, 因為OT要用多咗燈油火爉兼俾OT人工」, 反映佢將題目cost of using誤解為cost of running the office! 亦有同學話「成本是加長的時間成本」,其實呢個只係Mr.Wong開OT嘅time cost (時間成本), 例如响大學做兼職lecturer, 佢開兩粒鐘OT嘅總成本 (cost of having OT) 係兩粒鐘OT會用多咗電費 (開燈,冷氣,影印機等), 出OT糧俾員工, 加埋兩粒鐘做lecturer可賺到嘅人工。 見到題目問cost of using the office,同學要留心係諗OT兩粒鐘入面office有咩其他用途, 而唔係諗Mr.Wong OT兩粒鐘入面有咩其他事情可以做。

以下係經濟友响舊年暑假(24/08/2006) Econ 奪A解碼講座都同大家分享過有關opportunity cost嘅tricky題目:




經濟友响今年暑假(16/07/2007) Econ 奪A解碼講座亦都提過應屆會考生响 CE 07-B10(c)答得勁差嘅原因, 希望批改明年會考卷會見到少d考生再犯同樣錯處, 至少睇過或聽過經濟友提過呢件事嘅同學唔會跟一般考生「中招」啦! 有時間睇番08/05/2007 post 嘅會考經濟之答題技巧篇(第4講): Opportunity cost (機會成本) , 09/05/2007 post 嘅 會考經濟之重點搶分篇(第5講): Time cost (時間成本) and 會考經濟(10/05/2007) kalayee問 吧!

F4同學啱啱學到opportunity cost時可能未必掌握到concept嘅應用同答題竅門, 如果想知多d , 可以响即將開班嘅F4 Econonomics Regular Course度聽吓!



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