臨近考試，刷完經濟Essay，拿著完全看不懂的essay mark scheme，小伙伴們是不是又感到腦殼疼！

只有按照CIE評分要求答卷的孩子才能把有限的考試時間都花在刀刃上，收獲每一個得分點。

在講解之前，小編首先強調這樣兩個原則：

1.請仔細讀題！

請明確讀懂題目要求后再動筆！不按照題目要求寫的內容都會是零分！不按照考試要求寫的每個字都是在浪費時間！不是寫滿了試卷就能得分。

2.請運用經濟的知識點答題！

小編只想說不運用知識點的答卷都是耍流氓！

下面我們用一篇經典的PED大題例文

為大家講解分部解決最頭疼的12分的essay

原題呈現

W17/22

2 (b) Discuss whether an understanding of price elasticity of demand is of more benefit to a producer of agricultural goods than an understanding of income elasticity of demand. `12`

例文解讀

P1

Introduction 0分

Both price elasticity and income elasticity would be useful for the producer of agricultural goods.

開篇請解釋題目中的經濟名詞或題目中涉及的經濟問題。這部分雖然沒有具體分數，但為了文章連貫性建議結合題目解釋關鍵詞。

P2

Discuss how producers use PED to gain benefits. 4分

1.Price elasticity would inform a producer of the impact of price changes upon total revenue.

首段請用總起句明確表述整段內容。

2.Strengths of the PED: 2分

Elastic agriculture goods: a small decrease in the price will cause a large increase in the quantity demanded (Qd), and an increase in total revenue (TR)
Inelastic agriculture goods: price, Qd, TR

請通過畫圖或者舉例，讓解釋內容更充實！

3. Weaknesses of the PED: 2分

Accuracy of calculation.
e.g. Errors, omission, out of date data.
The PED of agriculture goods may change.
e.g. Due to advertising, the demand for green crops has changed from elastic to relatively inelastic.

請通過舉例讓解釋內容更豐富！

P3

Discuss how producers use YED to increase total revenue.

1.Income elasticity would inform the producer of the appropriate goods to produce as incomes change.

首段請用總起句明確表述整段內容。

2.Strengths of the YED: 2分

Income increase: switch to plant agriculture goods with positive elasticities.
e.g. Fine wheat
Income decrease: switch to plant agriculture products with negative elasticities.
e.g. Poor quality wheat.

請通過畫圖或者舉例，讓解釋內容更充實！

3.Weaknesses of the YED: 2分

The economic trends may change all the time.
e.g. Because of the long planting cycle of agricultural products, the unstable economic environment will make the crops face different economic environments when they harvest.
Long-term/expensive/opportunity cost. 2分
e.g. Once the production strategy is changed, all factors of production must be adjusted in the long term, including seeds, production machines, etc.

請通過舉例讓解釋內容更豐富！

P4

Evaluation 4分

Whether an understanding of price elasticity of demand is of more benefit to a producer of agricultural goods than an understanding of income elasticity of demand depends on the factors:

1. Factor 1: the stability of economic trend. 2分

If the economic trend is unstable.
e.g. Because of the long planting cycle of agricultural products, the unstable economic environment will make the crops face different economic environments when they harvest. Therefore, PED methods can better adapt to the changing economic environment by changing the price.
If the economic trend keeps constant.
e.g. Changing the production strategy can better serve the long-term development of producers and let them experience the benefits of production earlier. Thus, it is better to choose the YED methods.

2.Factor 2: Time period. 2分

If producers want to see the increasing total revenue in the short term.
e.g., 試試自己進行解釋 … PED
If the producer pays attention to long-term strategic development and has sufficient funds to adjust the strategy.
e.g.試試自己進行解釋 … YED

P5

Conclusion 1分

In reality，producers always hope to adjust the production or sales strategy to obtain higher total revenue in the changing economic environment at this moment. Thus, I think an understanding of the PED method may better.

以上P4內容最多可得4分。Conclusion總有1分，大家一定不要忘了總結哦！