Rafael • February 14, 2025

【DSE ECON】 DIMINISHING MARGINAL RETURN 速成

好多DSE ECON計數題 其實路只有一條 關鍵是還原

1. DIMINISHING MARGINAL RETURN講嘅唔係啲咩大道理,係你喺一件fixed factor上邊係咁加variable factors,個marginal product最終係會下降


2. 就好似一間uniqlo,你係咁擺sales落去,最後sales多過客,後邊入嚟嘅Sales冇產出之餘仲阻著咗原來班sales做嘢,個邊際產出就愈走愈低


3. 咁佢難喺邊呢?同學仔多數都係衰喺計數,但其實成條LAW得兩個變數,一係variable factors、二係MP,就好似之前阿SIR講profit maximizing point一樣(Average>Total>Marginal) ,考局最盡係俾AP,您換返做TP再換MP


4. 再難啲就係要同學「開倒車」,成條law係講緊擺variable factors,佢考您抽走啲variable factors, 其實唔難:


病房護士數目

-1

-2

-3

-4

-5


能病房能Serve的病人數

-1

-3

-5

-7

-9 


代病房原有護士數=10

病房現在護士數

9

8

7

6

5


代病房原有serve病人數=20

19

17

15

13

11


一代完就完美變返由第5個護士返工往後每加一個護士的TP,又行得返AP>TP>MP嘅路徑

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