📚 Case Study Skills in Economics: A Hands-On Guide | 经济案例分析实战演练
In Edexcel Year 10 Economics, mastering case study questions is essential for achieving top grades. These questions test your ability to apply theoretical knowledge to real‑world scenarios, combining understanding, analysis, and evaluation. This guide provides you with a step‑by‑step framework, worked examples, and a practice case to help you build confidence and excel in your exams.
在 Edexcel 十年级经济学中，掌握案例分析题对取得高分至关重要。这类题目考查你将理论知识应用到真实情境的能力，要将理解、分析与评估结合起来。本指南将为你提供一套循序渐进的框架、示范例子和一道练习题，帮助你建立信心，在考试中脱颖而出。
1. Understanding the Case Study | 理解案例
Start by reading the entire case study carefully without jumping to conclusions. Identify the main economic issue, the stakeholders involved, and any data or trends presented. Underline key facts, figures, and changes described over time.
首先要全文仔细阅读案例，不急于下结论。找出主要的经济问题、涉及的利益相关方以及任何呈现的数据或趋势。划出关键事实、数字以及随时间发生的变化。
Look for cues such as “increase in demand”, “government imposes a tax”, “rise in unemployment”, or “new technology”. These phrases signal the economic concepts you will need to use. Always ask yourself: ‘What is the fundamental economic problem here?’
留意诸如“需求增加”“政府征收税收”“失业率上升”或“新技术”这样的提示词。这些短语暗示了你需要运用的经济概念。始终问自己：“这里的基本经济问题是什么？”
2. Identifying Key Economic Concepts | 识别关键经济概念
Once you understand the context, list the relevant topics from the Edexcel specification. These may include demand and supply, price elasticity, market failure, government intervention, production costs, economic growth, or unemployment. A clear link between the case facts and the theory is the foundation of a strong answer.
理解背景后，根据 Edexcel 考纲列出相关主题。可能包括需求与供给、价格弹性、市场失灵、政府干预、生产成本、经济增长或失业。案例事实与理论之间的清晰联系是高水平答案的基础。
For example, if the case mentions that a firm has invested in automation, think about how this affects its supply curve, productivity, costs, and possibly employment. Write down 2–3 concepts that you will analyse in your response.
例如，若案例提到某企业投资了自动化，就要思考这对供给曲线、生产率、成本以及可能的就业的影响。写下 2–3 个你将在答案中分析的概念。
3. Applying the PEAK Method | 应用 PEAK 方法
A structured approach helps you earn marks for knowledge, application, analysis, and evaluation. Use the PEAK framework: Point (state your argument), Evidence (quote data or facts from the case), Analysis (explain the economic reasoning), and Know‑how (evaluate or make a judgement).
有条理的方法能帮你拿满知识、应用、分析和评估的分数。使用 PEAK 框架：Point（提出论点）、Evidence（引用案例中的数据或事实）、Analysis（解释经济学逻辑）和 Know‑how（进行评估或作出判断）。
- Point: “A subsidy on electric cars will increase their supply.”
- Evidence: “The case states that the government is offering £2,000 per vehicle.”
- Analysis: “This lowers production costs, shifting the supply curve to the right, leading to a lower equilibrium price and higher quantity.”
- Know‑how: “However, the impact depends on the price elasticity of demand; if demand is inelastic, the reduction in price may be small.”
中英对应：Point（论点）——“对电动汽车提供补贴将增加其供给。” Evidence（证据）——“案例称政府每辆车提供 2000 英镑补贴。” Analysis（分析）——“这降低了生产成本，使供给曲线右移，导致均衡价格降低、均衡数量增加。” Know‑how（懂得评估）——“然而，影响取决于需求的价格弹性；若需求缺乏弹性，价格下降幅度可能很小。”
4. Graph Analysis and Construction | 图表分析与构建
Many case study answers require you to draw or interpret a diagram. Your graph must be correctly labelled, with title, axes (Price, Quantity), and clearly marked shifts. Use solid lines for original curves and dashed lines for new ones. Always refer to the case study data when plotting changes.
很多案例分析答案要求你绘图或解读图表。你的图表必须正确标记，包含标题、坐标轴（价格、数量）以及清晰标示的移动。初始曲线用实线，新曲线用虚线。绘制变化时一定要参照案例数据。
A common Edexcel question is to show the effect of an indirect tax. Draw the supply curve shifting left by the amount of the tax. Label the new equilibrium price for consumers and the price received by producers. Mention the tax burden shared between them.
Edexcel 常见的题型是展示间接税的影响。画出供给曲线向左移动，移动量为税额。标注消费者支付的新均衡价格以及生产者实际得到的价格。说明两者之间的税收负担分担。
5. Demand and Supply Shifts – Example Case | 供需变化示例案例
Case snippet: ‘The popularity of plant‑based meat has surged, while a drought has reduced soy harvests.’ First, identify the two simultaneous shifts: an increase in demand (taste and preferences) and a decrease in supply (poor weather conditions). Analyse the combined effect on equilibrium price and quantity.
案例摘录：“植物肉的人气激增，同时一场旱灾使大豆歉收。”首先，识别两个同时发生的移动：需求增加（偏好变化）和供给减少（不利天气条件）。分析对均衡价格和数量的综合影响。
Draw a standard demand–supply diagram. Show the demand curve shifting right (D₁ to D₂) and the supply curve shifting left (S₁ to S₂). The equilibrium price unambiguously rises, but the effect on quantity is indeterminate – it may rise, fall, or stay the same depending on the magnitudes of the shifts. This is a perfect opportunity to demonstrate evaluation skills.
绘制标准的供需图。显示需求曲线右移（D₁ 至 D₂），供给曲线左移（S₁ 至 S₂）。均衡价格必定上升，但对数量的影响不确定——可能上升、下降或不变，取决于移动的幅度。这是展示评估能力的绝佳机会。
6. Government Intervention – Example Case | 政府干预示例案例
Consider a case where the government introduces a maximum price on rented housing to make it affordable. Explain the intention: to protect low‑income families. Then analyse the likely consequence – excess demand (a shortage) because the price is set below the market equilibrium.
设想一个案例，政府对租赁住房实行最高限价以使其可负担。解释意图：保护低收入家庭。然后分析可能后果——超额需求（短缺），因为价格设定在市场均衡水平之下。
Draw the diagram with a horizontal maximum price line below the equilibrium. Shade the shortage and discuss secondary effects: black markets, reduced quality of housing, and a fall in supply in the long run. Evaluate whether a housing benefit might be a better solution.
画出水平最高限价线低于均衡水平的图。标出短缺部分，并讨论附带影响：黑市、住房质量下降、长期供给减少。评估住房补贴是否可能是更好的解决方案。
7. Market Failure – Example Case | 市场失灵示例案例
Case: ‘A factory discharges waste into a river, harming fishing and tourism.’ Identify this as a negative production externality. The private cost to the factory is lower than the social cost, leading to overproduction. Use the divergence between marginal private cost (MPC) and marginal social cost (MSC) to explain market failure.
案例：“一家工厂向河流排放废物，损害了渔业和旅游业。”将其确定为负生产外部性。工厂的私人成本低于社会成本，导致过度生产。用边际私人成本（MPC）与边际社会成本（MSC）之间的差异来解释市场失灵。
Draw a diagram showing MSC above MPC, with the socially optimal output less than the free‑market output. Suggest government policies: an environmental tax equal to the external cost, regulations, or tradable pollution permits. Evaluate each policy’s effectiveness and feasibility.
画图显示 MSC 曲线在 MPC 曲线上方，社会最优产量低于自由市场产量。提出政府政策：等于外部成本的环境税、管制措施或可交易的污染许可证。评估每项政策的有效性与可行性。
8. Evaluating Economic Policies | 评估经济政策
Evaluation separates A* students from the rest. You must weigh up the pros and cons of a proposed solution, consider short‑run versus long‑run impacts, and recognise that some stakeholders may win while others lose. Use phrases like ‘depends on the price elasticity’, ‘in the long run’, or ‘government failure could arise if…’.
评估能力是区分 A* 学生与其他学生的重要方面。你必须权衡所提议方案的优缺点，考虑短期与长期影响，并认识到一些利益相关方可能受益而另一些受损。使用诸如“取决于价格弹性”“长期来看”或“如果……可能引发政府失灵”等表述。
For example, when evaluating a subsidy for renewable energy, acknowledge that it encourages green production, but it also imposes an opportunity cost on the government budget. It might be more effective if combined with a carbon tax, and its success hinges on the responsiveness of producers.
例如，在评估对可再生能源的补贴时，要承认它能鼓励绿色生产，但同时会给政府预算带来机会成本。若与碳税结合使用可能更有效，其成功取决于生产者的反应程度。
9. Common Mistakes to Avoid | 常见错误及避免
Not reading the question properly: Students often write everything they know about a topic without linking it to the case. Always answer the specific question using data from the extract. Ignoring units and axis labels: Marks are lost for missing ‘Price (£)’ or ‘Quantity (units)’ on diagrams. Just listing points: Edexcel requires chains of analysis, not bullet points without explanation.
未仔细审题：学生们常把自己对该主题所知全写上去，却不与案例联系起来。一定要用摘录中的数据回答具体问题。忽视单位和坐标轴标签：图表上漏标“价格（£）”或“数量（单位）”会失分。仅罗列要点：Edexcel 要求有分析链条，而非没有解释的要点罗列。
Additionally, avoid stating ‘it depends’ without saying on what it depends. Always justify your evaluation with economic reasoning. And if a question asks for a 6‑mark analysis, do not spend all your time on a 2‑mark definition.
此外，避免只说“看情况”而不说明取决于什么。始终用经济理由论证你的评估。如果一道题要求 6 分的分析，不要把时间全花在 2 分的定义上。
10. Practice Case Study with Questions | 实战练习与问题
Read the following scenario and attempt the questions that follow.
Case: The Sugar Tax Dilemma
The country of Sweetland consumes 20% more sugary drinks per person than the regional average. Health experts warn of rising obesity, which costs the government an extra £500 million per year in healthcare. The government proposes a £0.25 per litre sugar tax, while drinks producers argue it will cut 5,000 jobs in the industry. Consumer groups say that low‑income households spend a higher proportion of income on these drinks.
阅读以下情景并回答问题。
案例：糖税困境
Sweetland 国人均含糖饮料消费比区域平均水平高 20%。健康专家警告肥胖增加，这导致政府每年额外支出 5 亿英镑医疗成本。政府建议每升征收 0.25 英镑糖税，而饮料生产商认为这将导致该行业 5000 人失业。消费者团体指出，低收入家庭收入中用于这些饮料的比例更高。
Questions:
1. With a diagram, explain how the sugar tax affects the market for sugary drinks. (4 marks)
2. Discuss the likely impact on employment in the drinks industry. (4 marks)
3. Evaluate whether a sugar tax is the best policy to reduce obesity in Sweetland. (6 marks)
问题：
1. 结合图表，解释糖税如何影响含糖饮料市场。（4分）
2. 讨论对饮料行业就业可能产生的影响。（4分）
3. 评估糖税是否是 Sweetland 减少肥胖的最佳政策。（6分）
Try to answer using the PEAK method, drawing a clear tax diagram, and remember to comment on the regressive nature of the tax, the elasticity of demand, and alternative policies like education campaigns or subsidies on healthy drinks.
尝试用 PEAK 方法作答，画出清晰的税收图表，并记得评论该税的累退性质、需求弹性以及替代政策，如教育宣传活动或对健康饮料的补贴。
11. Tips for Exam Success | 考试成功技巧
Time management: Allocate roughly 1.2 minutes per mark. For a 12‑mark question, spend about 14–15 minutes. Leave a couple of minutes at the end to check your diagrams and spelling. Always label diagrams fully, embed them in your analysis text, and write in full sentences – never just bullet points for long‑form questions.
时间管理：每分约分配 1.2 分钟。对于 12 分的题，大约花 14–15 分钟。最后留几分钟检查图表和拼写。务必完整地给图表标示，将它融入你的分析文字中，长答题一定要用完整句子——不要只写要点。
Use the case study details repeatedly throughout your answer. This shows application. Stay calm, think like an economist, and always ask: ‘Who gains, who loses, and why?’ This habit will naturally lead to high‑level evaluation and the top marks you deserve.
在整个答案中反复使用案例的细节，这体现了应用能力。保持冷静，像经济学家一样思考，总是问：“谁得益，谁受损，为什么？”这个习惯自然能带来高水平的评估，让你获得应有的高分。
Published by TutorHao | Economics Revision Series | aleveler.com
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