📚 Case Study Analysis Practice | 案例分析实战演练
In Year 10 Edexcel Economics, case study questions are designed to bridge the gap between textbook theory and real-world application. These questions often provide a short extract, a table of data or a graph and ask you to explain, analyse or evaluate using economic concepts. This guide will equip you with a structured approach to tackling these scenarios, ensuring you can demonstrate both knowledge and higher-order skills such as application and evaluation.
在 Year 10 Edexcel 经济学中，案例分析题旨在连接课本理论与现实应用。题目通常会提供一段简短摘录、一张数据表或一张图表，要求你运用经济学概念进行解释、分析或评价。本指南将为你提供一套处理这些情景的结构化方法，确保你能展示知识以及应用与评估等高阶技能。
1. Understanding the Case Study Format | 理解案例分析形式
Edexcel case studies can appear in both Section B and Section C of the exam paper. A typical case might describe a local market, a firm's decision or a government intervention. The extract will contain clues such as 'price has increased', 'there is a shortage', 'a subsidy was introduced' or 'pollution has risen'. Your first job is to recognise which part of the syllabus is being tested.
Edexcel 案例分析题可能出现在试卷的B部分或C部分。典型的案例可能描述一个本地市场、一家企业的决策或政府的一项干预。摘录中会包含诸如“价格上涨”“出现短缺”“引入了补贴”或“污染加剧”等线索。你的第一项任务就是判断题目在考查课程大纲的哪一部分。
Always identify whether the scenario is microeconomic or macroeconomic. At Year 10, most cases focus on micro topics: how markets work, what causes prices to change, and when markets fail. A quick mental checklist of the Year 10 specification will prevent you from wandering into unfamiliar territory.
始终要判断情景属于微观经济还是宏观经济。Year 10 的案例大多聚焦微观主题：市场如何运作、价格变化的原因以及市场何时失灵。在大脑中快速回顾 Year 10 规格要求，可以避免你偏离到不熟悉的领域。
2. Reading Like an Economist | 像经济学家一样阅读
Before you start writing, read the case study twice. The first reading gives you the overall story; the second reading is for underlining economic triggers. Look for words that signal a change in demand or supply, a market failure, or a policy response. Phrases like 'bad harvest', 'rising incomes' or 'higher taxes on sugary drinks' immediately point towards supply shocks, demand shifts and indirect taxation.
在动笔之前，将案例阅读两遍。第一遍了解大致故事情节；第二遍用来划出经济学触发词。寻找那些标志着需求或供给变化、市场失灵或政策回应的词语。比如“歉收”“收入提高”或“对含糖饮料加税”等短语，立刻指向供给冲击、需求移动和间接税。
It is also essential to note any quantitative data. A percentage change in price or quantity can often be used to calculate price elasticity of demand (PED) or supply (PES). Even if no calculation is asked, mentioning that the figures suggest elastic or inelastic demand shows higher-level thinking.
同样重要的是注意任何定量数据。价格或数量的百分比变化通常可以用来计算需求的价格弹性（PED）或供给弹性（PES）。即使题目没有要求计算，提到这些数字表明需求是富有弹性还是缺乏弹性，也体现出更高层次的思维。
3. Extracting Demand and Supply Factors | 提取需求与供给因素
Most case studies at Year 10 revolve around shifting demand or supply. Create a simple mental table: on the left, list factors that affect demand (income, tastes, price of substitutes/complements, population); on the right, list supply-side factors (cost of production, technology, taxes, subsidies, weather). Match the extract's evidence to these factors.
Year 10 的大多数案例都围绕需求或供给的变动展开。在脑海中创建一个简易表格：左侧列出影响需求的因素（收入、品味、替代品/互补品价格、人口）；右侧列出供给因素（生产成本、技术、税收、补贴、天气）。将摘录中的证据与这些因素进行匹配。
For example, 'a new fitness trend increases the popularity of gym memberships' is a change in tastes – a rightward shift of the demand curve. 'Rising energy costs make it more expensive to produce plastic bottles' is a rise in cost of production – a leftward shift of the supply curve. Practise translating everyday language into economic terminology.
例如，“新的健身潮流提高了健身房会员的受欢迎程度”属于品味变化——需求曲线向右移动。“能源成本上涨使塑料瓶的生产更加昂贵”则属于生产成本上升——供给曲线向左移动。要多加练习将日常语言转化为经济学专业术语。
4. Movements vs. Shifts in Curves | 曲线移动与变动
One of the most common errors is confusing a movement along a curve with a shift of the entire curve. A change in the good's own price causes a movement along the demand or supply curve (contraction or extension). Any other factor – a non-price determinant – causes the whole curve to shift.
最常见的错误之一，是混淆沿曲线的移动与整条曲线的位移。商品自身价格的变化会引起需求曲线或供给曲线上的移动（收缩或延伸）。其他任何因素——即非价格决定因素——都会导致整条曲线的位移。
In the case study, if you read 'the price of coffee rose by 15%, and cafés bought fewer coffee machines', this is a movement along the demand curve for machines, not a shift. But if 'a report linking coffee to health benefits boosts café sales', this shifts the demand for coffee beans rightwards. Being precise about this distinction earns marks for accurate application.
在案例中，如果你读到“咖啡价格上涨15%，咖啡馆减少购买咖啡机”，这是沿咖啡机需求曲线的移动，而非位移。但如果是“一篇将咖啡与健康益处联系起来的报告提振了咖啡馆的销售”则会使得对咖啡豆的需求向右位移。准确区分这两者能为你赢得精准应用的分数。
5. Elasticity Calculations Made Simple | 简化弹性计算
dies frequently include percentage changes so you can work out PED or PES. Remember: PED = %Δ quantity demanded ÷ % than 1 means inelastic (necessities, addictive goods). PES follows a similar logic: PES = %Δ quantity supplied ÷ %Δ price.
案例分析经常包含百分比变化，以便你计算 PED 或 PES。记住：PED = 需求量变动% ÷ 价格变动%。结果大于1表示富有弹性（奢侈品、有替代品的商品）；小于1表示缺乏弹性（必需品、成瘾性商品）。PES 遵循类似逻辑：PES = 供给量变动% ÷ 价格变动%。
Use the figures from the text. Suppose a case states: 'Ticket prices rose 10%, and attendance fell 20%.' PED = -20% ÷ 10% the minus sign for magnitude; it is elastic.) You can then comment that the football club' fall because demand is price elastic. This connects calculation to a real business outcome – a perfect evaluation point.
运用文中的数字。假设案例中写道：“票价上涨10%，观众人数下降20%。”PED = -20% ÷ 10% = -2。（忽略负号只看大小；是富有弹性的。）你可以接着说，足球俱乐部的总收入会下降，因为需求富于价格弹性。这样就把计算与现实经营结果联系了起来——一个极好的评估得分点。
| PED Value | PED 数值 | Elasticity | 弹性 | Revenue effect when price rises | 涨价对收入的影响 |
| > 1 | Elastic | 富有弹性 | Total revenue falls | 总收入下降 |
| < 1 | Inelastic | 缺乏弹性 | Total revenue rises | 总收入上升 |
6. Interpreting Market Equilibrium | 解释市场均衡
After identifying shifts, you need to determine the new equilibrium price and quantity. A rightward demand shift (increase) raises both price and quantity. A leftward supply shift (decrease) raises price but reduces quantity. When both curves shift, the net effect depends on the relative size of the shifts – case studies often hint at which effect is larger.
在识别出位移后，你需要确定新的均衡价格和数量。需求曲线右移（增加）会提高价格和数量。供给曲线左移（减少）则会提高价格但减少数量。当两条曲线同时移动时，净效应取决于位移的相对大小——案例通常会暗示哪种效应更大。
Use precise language: 'Equilibrium price increases from P1 to P2, and equilibrium quantity contracts from Q1 to Q2' sounds authoritative. Avoid saying 'the price goes up'. Labelling a diagram in your answer, even if not explicitly requested, reinforces your explanation and often gains marks for the quality of written communication.
使用精确的语言：“均衡价格从 P₁ 上升到 P₂，均衡数量从 Q₁ 收缩到 Q₂”听起来具有权威性。不要说“价格上去了”。在答案中给图表标注标签，即使题目没有明确要求，也能强化你的解释，并经常因书面表达质量而获得加分。
7. Spotting Market Failure | 发现市场失灵
Many Year 10 case studies embed a market failure. Look for keywords like 'pollution', 'congestion', 'second-hand smoke', 'obesity' or 'under-provision of streetlights'. These signal negative externalities, positive externalities, demerit goods or public goods. Recognising the type of market failure is the first step to scoring high on analysis marks.
大量 Year 10 案例会隐含市场失灵。寻找诸如“污染”“拥堵”“二手烟”“肥胖”或“路灯供应的不足”等关键词。这些词表明存在负外部性、正外部性、有害品或公共品。识别市场失灵的类型是获取分析高分的首要步骤。
Explain the gap between private and social costs/benefits. If a power station emits fumes, the private cost of electricity is lower than the social cost, leading to overproduction. The case extract might mention 'local asthma cases rose'. That is a clue to identify the divergence and apply the negative externality diagram.
解释私人成本/收益与社会成本/收益之间的差距。如果发电厂排放烟雾，电力的私人成本低于社会成本，会导致过度生产。案例摘录可能提到“当地哮喘病例增多”。这就是识别这一定价背离并运用负外部性图表的线索。
8. Critiquing Government Policies | 评价政府政策
Case studies often describe a tax, subsidy, regulation or information campaign. Your evaluation should consider effectiveness, unintended consequences and equity. A tax on plastic bags may reduce usage (effective) but can hurt low-income families more (inequitable). A subsidy on solar panels might increase adoption but put pressure on government budgets.
案例分析经常描述某项税收、补贴、监管或信息宣传活动。你的评价需要考量有效性、非预期后果与公平性。对塑料袋征税或许能减少使用（有效），但可能对低收入家庭伤害更深（不公平）。太阳能电池板补贴或许能增加使用率，但会给政府预算带来压力。
Frame your evaluation using 'It depends on…' For example, 'The effectiveness of the subsidy depends on the PED of solar panels. If demand is elastic, the subsidy will cause a larger rise in quantity demanded.' This shows contextualised thinking, a hallmark of top-level responses.
用“这取决于……”来构建你的评价。例如，“补贴的有效性取决于太阳能电池板的需求价格弹性。如果需求富有弹性，补贴将引起需求量的大幅增长。”这体现了基于情景的思考，是高分答案的标志。
9. Using Diagrams Effectively | 有效使用图表
A well-drawn, fully labelled diagram with clear equilibrium points can turn a 3-mark answer into a 5-mark one. Always label both axes (Price and Quantity), draw arrows to show shifts, and annotate the initial and new equilibriums. Use dotted lines to connect equilibrium to axes for precision.
一个绘制良好、完整标注且具有清晰均衡点的图表，能将一个3分的答案变成5分。始终标注两条轴线（价格与数量），画箭头表示位移，并注释初始均衡和新均衡。用虚线将均衡点连接到轴线，确保精确。
Practise drawing common diagrams: demand and supply shifts, the negative externality diagram (with MSC/MSB), and the PED diagram showing total revenue rectangles. In the exam, draw these quickly using a ruler and pencil. A diagram without reference in the text is wasted – explicitly write 'See Figure 1' and explain what it shows.
练习绘制常见的图表：需求与供给位移图、负外部性图（附带 MSC/MSB），以及显示总收入矩形的 PED 图。考试时，用尺子和铅笔快速画出这些图。文中未提及的图表等于白费——要明确写上“参见图1”并解释它所显示的内容。
10. Structuring a High-Mark Answer | 构建高分答案结构
For longer 6-, 9- or 12-mark case study questions, a clear structure is key. Use a framework such as KAA (Knowledge, Application, Analysis) for the first part and EV (Evaluation) for the final part. Begin with a definition of the economic concept in play, then apply it directly to the case facts.
对于较长的6分、9分或12分案例题，清晰的结构是关键。采用类似 KAA（知识、应用、分析）加 EV（评价）的框架。开头先给出所涉经济概念的定义，然后直接将其应用到案例事实上。
A sample paragraph for analysis: 'The introduction of the sugar tax (knowledge) increases the cost of producing fizzy drinks [application from case], shifting the supply curve to the left. This raises the equilibrium price and reduces the quantity consumed [analysis], helping to reduce obesity.' Follow this with an evaluation paragraph weighing pros and cons.
分析段示例：“糖税的引入（知识）增加了生产汽水的成本[案例应用]，使供给曲线向左移动。这提高了均衡价格并减少了消费量[分析]，有助于减少肥胖。”紧接着写一段评价，权衡利弊。
11. Time Management in Exams | 考试时间管理
Case study questions can be time-consuming. Allocate your time based on the marks: roughly 1 minute per mark. For a 12-mark question, spend about 3 minutes reading and planning, 4 minutes writing analysis, 3 minutes on evaluation, and 2 minutes drawing and reviewing a diagram.
案例分析题可能会很耗时。根据分值分配时间：大致每1分分配1分钟。对于一个12分的题目，大约花3分钟阅读与规划，4分钟写分析，3分钟写评价，2分钟绘制并检查图表。
Resist the temptation to write everything you know about the topic. Stick to the case. If the extract mentions 'a drought in Brazil', do not write a full essay on climate change – focus on the impact on the coffee supply curve and subsequent price changes. Relevance is rewarded far more than breadth.
忍住把关于该主题知道的一切都写上去的诱惑。要紧扣案例。如果摘录提到“巴西的干旱”，不要写一篇关于气候变化的长篇大论——集中写对咖啡供给曲线的影响及随之而来的价格变化。相关性远比广度更受赏识。
12. Worked Example: The Organic Apple Market | 实例演练：有机苹果市场
Let us apply everything to a short case: 'The town of Greenford has seen a 25% rise in the number of health-conscious consumers. Meanwhile, new EU rules require expensive pesticide-free certification for organic farms. The price of organic apples has doubled, but the quantity bought has hardly changed.' Read, underline, and identify: rising health awareness shifts demand right; certification costs shift supply left. The double price rise with little change in quantity suggests demand is price inelastic.
让我们将所有方法应用到一个简短的案例上：“格林福德镇注重健康的消费者人数增长了25%。同时，新的欧盟规定要求有机农场取得昂贵的无农药认证。有机苹果的价格翻了一倍，但购买数量几乎未变。”阅读、划关键词并识别：健康意识提高使需求曲线右移；认证成本使供给曲线左移。价格翻倍而数量变化极小，表明需求缺乏价格弹性。
ing right, S shifting left, new equilibrium at higher P, similar Q. 3. Calculate PED using %ΔQ≈0% ÷ 100%≈0 – perfectly inelastic? More realistically, Q changed only 2%, so PED = 2% ÷ 100% = 0.02, highly inelastic. 4. Evaluation: farmers' run, alternatives might emerge, making demand more elastic. This would change the outcome.
你可以这样写：1. 需求与供给的定义。2. 图表：需求右移、供给左移，新均衡点价格更高、数量相近。3. 计算 PED，用 %ΔQ ≈ 0% ÷ 100% ≈ 0——完全无弹性？更实际地说，Q 只变动了2%，所以 PED = 2% ÷ 100% = 0.02，高度无弹性。4. 评价：农民总收入大幅增长；消费者为几乎未变的数量支付了高得多的价格。但长期来看，可能会出现替代品，使需求变得更具弹性。这将改变原有结果。
This structured answer moves from knowledge through application to evaluation, using both words and a diagram. It shows precisely what Edexcel examiners look for: a candidate who can think like an economist.
这种结构化的答案从知识过渡到应用，再到评价，既用文字也用图表。这正好展示了 Edexcel 考官所期待的特质：一名能像经济学家一样思考的考生。
Published by TutorHao | Economics Revision Series | aleveler.com
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