目标与政策的相互关系
爱德思国际普通中等教育证书(IGCSE)经济学· 2.1.3· 12 分钟阅读
1. 权衡1:失业与通胀★★☆☆☆⏱ 2 min
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当政府使用扩张性财政或货币政策,通过增加经济体中的总需求来降低失业率时,往往会导致一般物价水平上升,由此在两个目标之间形成权衡关系。
政府下调所得税,将失业率从4%降至2.8%。请说明该政策与通胀之间可能存在的权衡关系。
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- 下调所得税会增加家庭的可支配收入,带动消费支出增长,推高经济体的总需求水平。
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- 随着企业发现自身产品的需求上升,它们可能会提价以提升利润,在企业接近满负荷运营时这一现象尤为明显。
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- 此外,企业可能需要支付更高的工资来吸引剩余的失业劳动力,这会推高生产成本,而成本上升也会以涨价的形式转嫁给消费者。
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结果:失业率下降,但作为政策的副作用,通胀水平上升。
Exam tip:
作答4分的解释类题目时,在阐明权衡关系后必须写出两个关联的因果步骤,才能拿到满分。
2. 权衡2:经济增长与通胀★★☆☆☆⏱ 2 min
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需求拉动型的快速经济增长,是指经济体的总支出增速超过该国生产商品和服务的能力。这种过度需求几乎总会推高通胀,使得两个目标之间出现冲突。
某国的年经济增长率达到6.2%,远高于2.5%的长期平均水平。请分析该情况对通胀可能产生的影响。
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- 增速超过经济体生产能力的增长,意味着商品和服务的需求超过了可供给的总量。
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- 企业会通过提价来配给有限的现货商品,引发需求拉动型通胀。
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结果:短期的高增长会推高通胀,久而久之会侵蚀家庭的购买力。
3. 权衡3:经济增长与环境保护★★★☆☆⏱ 3 min
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工业与制造业增长,以及收入上升带动的居民消费增长,往往会导致碳排放增加、污染加剧、不可再生自然资源消耗加速,由此在经济增长与环境可持续发展目标之间形成权衡关系。
政府放宽工厂排放法规,以吸引新的制造业投资、拉动经济增长。请评估该政策与环境保护之间的权衡关系。
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- 放宽排放规则会降低企业的生产成本,激励企业扩大经营规模、雇佣更多工人,提升国民产出(实现GDP增长)。
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- 工厂产出提升会导致空气与水污染加剧,碳排放增加,进一步恶化气候变化问题,损害当地居民的健康。
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- 该权衡关系的严重程度取决于政府如何从增长的企业中获取额外税收:如果政府将税收投入可再生能源或污染治理领域,就可以部分抵消对环境的损害。
Exam tip:
作答评估类题目时,必须补充一个可以削弱权衡程度的因素,才能拿到最高分。
4. 权衡4:通胀与经常账户余额★★★☆☆⏱ 3 min
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如果国内通胀率高于其贸易伙伴国的通胀率,外国购买者面临的本国出口商品价格会上升,而国内消费者购买的进口商品则会相对更便宜。这会恶化国际收支中的经常账户余额,形成政策权衡关系。
某国的通胀率升至7%,而其主要贸易伙伴的平均通胀率为2%。分析这一情况对该国经常账户余额的影响。
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- 国内通胀水平更高意味着国际买家面对的出口商品价格更高,因此该国出口商品的需求会下降。
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- 进口商品如今相比本国生产的商品价格更低,因此国内消费者会购买更多进口商品。
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- 出口收入减少、进口支出增加会导致经常账户赤字扩大(或经常账户盈余收窄)。
5. 政府政策的优先级选择与权衡妥协★★★★☆⏱ 4 min
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由于经济政策几乎总会在不同政策目标之间产生权衡关系,政府必须根据当前的经济状况、政治优先级以及各类问题的严重程度,选择需要优先达成的目标。例如,在经济衰退时期,政府可能会将降低失业率作为优先目标,即便这会导致通胀小幅上升;而在高通胀时期,政府可能会接受失业率的临时上升,以将物价水平控制在合理范围内。
A government uses low interest rates to boost growth. Which of the following is a likely trade-off?
Lower inflation
Higher inflation
Improved current account balance
Lower pollution
显示答案
Higher inflation —Low interest rates increase consumer and business spending, leading to higher demand that can push up prices (inflation) if growth outpaces productive capacity.
6. 常见陷阱
错误做法:
Stating that trade-offs are always fixed and unavoidable.
原因:
Many trade-offs can be reduced over time, for example supply-side policies can boost growth without inflation by increasing the economy’s productive capacity.
正确做法:
Note that trade-offs are short-run conflicts, and can be mitigated with targeted complementary policies where relevant.
错误做法:
Including the Phillips curve or AD/AS diagrams in answers.
原因:
These are not required for Edexcel IGCSE Economics 4EC1, and including them will not get you extra marks, and may lead to you adding irrelevant content that wastes time.
正确做法:
Only use qualitative cause-effect chains to explain trade-offs as specified in the syllabus.
错误做法:
Forgetting to link the trade-off explicitly to a government policy action.
原因:
This topic focuses on the relationship between policies and objectives, so answers that do not reference the policy causing the trade-off will lose marks.
正确做法:
Always start your answer by stating which policy is being used to achieve the first objective, before explaining how it harms the second objective.
错误做法:
Only describing the conflict without weighing priorities for evaluate questions.
原因:
Evaluate questions require you to make a supported judgement about which objective the government should prioritise, not just state that a trade-off exists.
正确做法:
For evaluate questions, end your answer with a clear conclusion about which objective is more important, justified by context (e.g. recession vs high inflation environment).
7. 速查表
Trade-off Pair | Cause of Conflict | Typical Policy Context |
|---|---|---|
Unemployment vs Inflation | Expansionary policy raises demand, pushing up prices and wages | Cutting income tax, lowering interest rates to reduce unemployment |
Economic Growth vs Inflation | Demand outpaces productive capacity during rapid growth | Boom period with growth above long-run average |
Economic Growth vs Environmental Protection | Higher industrial output and consumption increase pollution and resource use | Relaxing regulations to attract manufacturing investment |
Inflation vs Current Account | Higher domestic prices reduce export competitiveness and raise import demand | Period of high domestic inflation relative to trading partners |
8. 常见问题
本考点需要绘制菲利普斯曲线吗?
不需要。爱德思IGCSE经济学4EC1考纲不要求掌握菲利普斯曲线。所有权衡关系均通过因果链进行定性解释,无需使用正式模型。
该考点的题目通常占多少分值?
该考点在试卷2中高频出现,简答题分值为2-4分,拓展评估类题目最高可达8分,要求考生权衡不同政策的优先级。
深入阅读
下一步
Now that you understand the core trade-offs between government policy objectives, you can apply this knowledge to answer extended response questions in Paper 2, which often ask you to evaluate policy choices in real-world contexts. Make sure you are familiar with the different types of government policy instruments and how they work, as well as the individual macroeconomic objectives, to build fully rounded answers. You should also practice past Paper 2 questions on this topic to get comfortable structuring cause-effect chains and justifying priority judgements for evaluate questions, which make up a large share of marks on this paper.
