ALEVEL的总分是由AS和A2两年分数合并得出的,因此2年内的每次考试,大家都要踏实复习。本文就来整理一个非常关键的AS经济知识点——PED(Price elasticity of demand),为复习查漏补缺。
ALEVEL经济考试试卷分为Paper 1和Paper 2,分别是AS阶段的选择题和大题,占40和60%分值比例。
试卷Paper 3和 Paper 4分别是A2阶段的选择题和大题,分别占35%和65%的分值比例。
AS经济的考试内相对透明,教学大纲变化不频繁,这就决定了考试内容的局限性。多年来,重复考查的知识点是非常集中的,(考试有重复率,熟悉往年的题目可以加分)因为知识点重复率高,或多或少都有以前考题的痕迹。
这就是为什么所有复习攻略都在反复强调刷题的原因
【定义】
a measure of the degree of responsiveness of the quantity demanded to a change in the price, ceteris paribus.
if PED=0, demand is perfectly price inelastic
if PED>1, demand is price elastic
if PED<1, demand is price inelastic
if PED=1, demand is price unitary
if PED=infinity, demand is perfectly price elastic
【影响PED的因素】
Time
Existence of close substitutes
Price relative to income (proportion of income spend on)
Degree of necessity
Durability
AS经济知识点【Macroeconomic applications of PED】
1. PED & Exports and Imports due to the impact of exchange rate
PED inelastic appreciation X上升,M下降
PED elastic appreciation X下降,M上升
同理可得depreciation
2. PED & depreciation/devaluation (M-L condition)
M-L condition holds depreciation improve current account position
M-L condition not holds depreciation Worsen current account position
注意回答M-L condition的时候,不要忘记J-Curve!
Provided M-L condition holds, depreciation immediately worsen the current account, and improve the current account in the longer run.
【PED , tariff的有效性】
PED inelastic a less effect on the level of imports
PED elastic a greater effect on the level of imports
要注意The effect of the tariff depends on PED以及domestic firm的PES
AS经济知识点PED的重要内容就整理到这里。在A Level考试中,AS和A2的占比相同,但是AS的难度却比A2要低不少。因此,大家都要努力在AS考试中拿一个相对较高的分数(90+/100)呀。如果感觉某个科目需要专门的辅导,可以点击预约试听【ALEVEL同步培训班】——
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筑梦牛剑/G5/常春藤