Rafael • February 4, 2025
【DSE ECON】關於Total Social Surplus的錯誤迷思
Total social surplus細咗唔一定係Inefficient
1. 一開學啲中五同學仔開始學返Total Social Surplus,留意到唔少人都係見三角形就盲篤做Deadweight Loss,基礎十分薄弱
2. 亦有同學仔覺得Total Social Surplus細咗就會造成deadweight loss,邏輯上呢句嘢係唔啱嘅,正確應該係Total Social Surplus喺constraints下冇最大化,有啲量個Marginal Benefit仍高於Marginal Cost但冇做先構成Deadweight Loss
3. 考局睇準學生嘅誤解,喺2023 Section B出過一條幾試探性嘅(Q5, 可refer to 下方條片嘅解說),大意係問Marginal Cost因材料成本上升,個Total Social Surplus前後細咗,係咪就有deadweight loss,賽後報告係話表現令人失望嘅
4. 呢條當年考Deadweight Loss果part只有2分,未必好alert到同學要對Total Social Surplus有更深入嘅了解,但個implication係考局knows all you well,一定要小心翻炒
裡面教齊點樣喺表計返Total Social Surplus
有稅/有津貼/正常狀況,輕鬆1 take計到!

作者: EDUCATION
•
2025 Aug 28
編按﹕唔講知己知彼果啲老土嘢,睇多幾篇按課攻略你會開始 明,人哋點SET局去攻、你點學返適當嘅SK ILL SETS去守,最後其實每課都係咁學、都有方法做啱做對! 一口氣做返哂10幾年BANK REC,HKDSE+會計師公會MOCK,攞個感覺歸納出呢篇超級BANK REC攻略,學BAFS齋學規矩唔出海遇見下風浪,粒星點會穩袋落袋,送俾大家 超級BANK REC FAQ : 1. 啲entries使唔使寫日期? BANK REC有時要你跟指引準備原來本cash book,呢個情況係一定要寫日期;但如果係已經有cash book,你要搵返adjusted cash book balance,即你做緊個controlling角色,就冇必要寫日期 2.改正cash book啲entries,係咪直接填返stale cheque、direct debit呢啲「bank rec學名」就ok? T account本身啲entries就要對應T account,stale cheque係由trade receivable嚟就要mark 返trade receivable;direct debit對口係electricity expense就要填返electricity expense 3. 幾時unpresented cheque係加?幾時成係減? BANK REC場景有corrected cash book去bank statement balance、有bank statement balance去corrected cash book、瘋狂起上嚟有bank statement balance 去未update嘅cash book balance(2020Q9),所以從來唔係指定錯誤(unpresented / unncredited)係加係減嘅問題,而係該錯誤點樣令到你手上比較緊嘅balance 多咗定少咗嘅問題(bank rec 上下方balance多咗就加、少咗就減) 4. 係咪cash book有、bank statement冇就一定喺cash book度改 & vice versa? Cash book/Bank Statement都可以做咗啲多餘嘢,做bank rec嘅目的大部分時間係改錯,所以如果cash book有、bank statement 冇,而明確顯示係cash book做多,我哋都會改cash book 5. 玩咗咁多年,仲有咩題型值得玩? 會計師公會有幾題新穎玩法都值得跟進: a) cash book balance唔係直接俾你,而係俾月頭,再灑啲該月total receipt、total payment,務求玩你一輪先搵到起埗點 b) 零零舍舍有一個bullet嘅操作,例如credit transfer係唔俾粒數你,一路unknown 到尾要你迫返出嚟 c)見過最癲嘅係bank statement收咗overdraft interest,個interest跟year end balance嘅1%,而year end balance已俾咗你,即要倒推返粒息出嚟,呢啲絕對係星星位 6.我學果時明哂所有操作,總係到做果刻會唔啱? BANK REC最令學生破防嘅係,我哋一直嘅做人做事嘅原則都係修正錯處,做英文proof reading 如是、做correction of error如是,但喺BANK REC我哋唔會控制到銀行改錯,我哋只能改哂cash book 錯處後,再解釋cash book與bank statement嘅分歧,呢一環係學生最弱,佢哋未明bank rec係「還原」bank statement 錯嘅balance,再做埋類似2020Q9果種用bank statement 還原去未修正嘅cash book就會亂到阿媽到唔認得 由呢度起埗重頭操起 👉🏻BANK RECONCILIATION 精讀課程