📚 Year 9 AQA Economics: Case Study Practice | 九年级AQA经济：案例分析实战演练
Case studies are at the heart of AQA Economics because they bring economic concepts to life. This guide will walk you through a powerful method for tackling case study questions with confidence. By working through real-world scenarios, you will learn how to define key terms, apply theory, and write clear, evidence-based answers.
案例分析是AQA经济学考试的核心，因为它让经济概念变得鲜活。本指南将带你掌握一种高效方法，自信应对案例分析题。通过演练真实情境，你将学会定义关键术语、运用理论，并写出清晰、基于证据的答案。
1. Understanding Case Study Questions in Economics | 理解经济学的案例分析题
In Year 9 AQA Economics, case study questions present a short story about an individual, a business, or a government facing an economic decision. Your task is to identify the economic problem, explain relevant concepts, and offer analysis. Marks are awarded for applying knowledge to the specific context – not just for repeating textbook definitions.
在九年级AQA经济中，案例分析题会讲一个简短的故事，关于个人、企业或政府面临的经济决策。你的任务是识别经济问题，解释相关概念，并给出分析。评分时看重的是把知识应用到具体情境里，而不是只重复课本定义。
Common question styles include: 'Explain the opportunity cost involved', 'Analyse the effect on demand', or 'Discuss whether the business should hire more workers'. You must read the case carefully, underline economic clues, and plan your answer before writing.
常见的问题类型包括：“解释涉及的机会成本”、“分析对需求的影响”，或“讨论该企业是否应该雇用更多工人”。你必须仔细阅读案例，划出经济线索，并在动笔前规划答案。
2. The 'WISE' Approach to Case Studies | 案例分析的“WISE”方法
Use the WISE method to structure every case study answer: W – What are the key economic terms? Define them. I – Identify the issue using the case data. S – Show the economic reasoning with diagrams or chains of logic. E – Evaluate or consider alternative viewpoints where possible.
每道案例分析题都可以用WISE方法来组织答案：W——关键经济术语是什么？下定义。I——利用案例数据识别问题。S——用图表或逻辑链条展示经济学推理。E——尽可能评估或考虑其他观点。
For example, if a case says 'Sofia has £10 and must choose between a book and a cinema ticket', you would W: define scarcity and opportunity cost; I: state the choice and constraint; S: explain the next-best alternative foregone; E: briefly note how preferences might change the decision.
例如，如果案例说“索菲亚有10英镑，必须在书和电影票之间选择”，你就要W：定义稀缺性和机会成本；I：陈述选择和约束；S：解释所放弃的次优选择；E：简要说明偏好如何可能改变决策。
The WISE method helps you avoid vague answers and ensures you stay rooted in the context. Practice applying it with the cases below.
WISE方法帮助你避免模糊回答，并确保紧扣情境。通过以下案例来练习运用它。
3. Case Study 1: Sofia's Saturday Choice (Scarcity & Opportunity Cost) | 案例一：索菲亚的周六选择（稀缺性与机会成本）
Sofia has £15 saved from her weekly allowance. She wants to buy a new art set for £15 and also go ice skating with friends for £15. She cannot do both because her money is limited. She decides to buy the art set.
索菲亚从每周零花钱中攒了15英镑。她想花15英镑买一套新画具，也想花15英镑和朋友去滑冰。因为钱有限，她不能两样都做。她决定购买画具。
WISE analysis: Scarcity means resources are finite. Sofia’s £15 is a scarce resource. Opportunity cost is the next-best alternative given up – here, the ice-skating trip. The economic choice involves a trade-off.
WISE分析：稀缺性指资源是有限的。索菲亚的15英镑是稀缺资源。机会成本是放弃的次优选择——这里是滑冰之旅。经济选择涉及权衡。
When answering a 4-mark 'Explain the opportunity cost' question, you would write: 'The opportunity cost of Sofia buying the art set is the enjoyment and experience of ice skating with her friends. Because her money is scarce, she must sacrifice one benefit to gain another.' Always refer back to the case.
回答一道4分的“解释机会成本”题时，你可以写：“索菲亚购买画具的机会成本，是她与朋友一起滑冰的乐趣和体验。因为她的钱是稀缺的，她必须牺牲一个好处来换取另一个。”一定要回扣案例。
4. Case Study 2: The Coffee Shop's Dilemma (Factors of Production & Productivity) | 案例二：咖啡店的困境（生产要素与生产率）
Bean & Brew is a small coffee shop. The owner, Mr. Lee, is considering hiring a second barista during busy Saturday mornings. He currently uses one espresso machine (capital) and one worker (labour). On Saturdays, queues form and some customers leave without buying.
“Bean & Brew”是一家小咖啡店。老板李先生考虑在繁忙的周六早上再雇一名咖啡师。他目前使用一台意式咖啡机（资本）和一名员工（劳动）。周六时，顾客排长队，有些人没买到就走了。
Factors of production: land (the shop), labour (barista), capital (coffee machine), and enterprise (Mr. Lee). Productivity measures output per unit of input. Currently, labour productivity might be high, but the capital is under pressure. Adding more labour could increase total output if the machine can handle it.
生产要素：土地（店铺）、劳动（咖啡师）、资本（咖啡机）、企业家才能（李先生）。生产率衡量每单位投入的产出。目前，劳动的生产率可能很高，但资本承压。增加劳动可能提高总产出，前提是咖啡机能应付。
If Mr. Lee hires another worker without adding a second machine, the workers might share the machine, but time lost waiting could reduce marginal gains. This brings in the law of diminishing returns – a concept worth hinting at here. In your answer, use case evidence: 'Saturday queues' show demand exceeds capacity.
如果李先生不加机器就多雇一人，工人可能共用咖啡机，但等待时间会让边际收益减少。这里就隐含了边际收益递减规律。作答时要用案例证据：“周六的排队”表明需求超过了产能。
5. Case Study 3: The New Skate Park Proposal (Government Spending & Opportunity Cost) | 案例三：新滑板公园提案（政府支出与机会成本）
A local council has a budget of £200,000 and must decide between building a new skate park for young people or upgrading the public car park for local businesses. The council surveys residents: 60% of teenagers favour the skate park; 55% of adults prefer the car park upgrade.
某地方议会有20万英镑预算，必须在为青少年建造新滑板公园和为当地商家升级公共停车场之间做出选择。议会调查了居民：60%的青少年支持滑板公园；55%的成年人更想要停车场升级。
Government spending involves opportunity cost because public funds are scarce. The skate park could improve youth health and reduce anti-social behaviour, whereas upgrading the car park might attract more shoppers and support local businesses. Every choice means trade-offs.
政府支出涉及机会成本，因为公共资金是稀缺的。滑板公园可能改善青少年健康、减少不良行为，而停车场升级可能吸引更多购物者，支持本地商业。每个选择都意味着权衡。
When evaluating, consider who benefits and who loses. An AQA answer might state: 'The opportunity cost of building the skate park is the potential increase in business revenue and convenience for shoppers that the car park upgrade would have provided. The council must weigh different stakeholders' interests.'
在评估时，要考虑谁获益、谁受损。AQA的一个答案可能这样写：“建造滑板公园的机会成本，是停车场升级原本可能带来的商业收入增长和购物者的便利。议会必须权衡不同利益相关者的诉求。”
6. Case Study 4: Trainers Trend (Demand & Supply Shifts) | 案例四：运动鞋潮流（需求与供给变动）
A famous athlete launches a new signature trainer, causing a sudden surge in popularity. At the same time, a factory fire disrupts the supply of synthetic leather, raising production costs. The initial market equilibrium was at price P₁ and quantity Q₁.
一位著名运动员推出了新款签名运动鞋，引发人气暴增。同时，一家工厂火灾中断了合成皮革的供应，推高了生产成本。初始市场均衡点在价格P₁和数量Q₁。
th shifts put upward pressure on price, so the new equilibrium price rises to P₂. However, the effect on quantity is ambiguous – demand shift pushes Q up, supply shift pushes Q down.
人气暴增使需求曲线右移（D₁→D₂）。原材料中断使供给曲线左移（S₁→S₂）。这两个变动都给价格带来上行压力，因此新均衡价格涨至P₂。但对数量的影响是不确定的——需求变动推高Q，供给变动压低Q。
In a case study answer, always draw a rough diagram mentally. Write: 'The celebrity endorsement raises consumer preferences, increasing demand. Meanwhile, higher input costs reduce supply. The price of trainers will unambiguously rise, but the quantity traded may rise or fall depending on the relative size of the shifts.'
在案例分析答案中，始终要在脑中画出粗略的图形。你可以写道：“名人代言提升了消费者偏好，增加了需求。同时，投入成本上升减少了供给。运动鞋的价格将明确上涨，但交易量可能上升或下降，具体取决于变动的相对幅度。”
7. Case Study 5: Smartphone Production & Technology (Supply & Cost of Production) | 案例五：智能手机生产与技术（供给与生产成本）
A smartphone manufacturer invests in robotic assembly lines, reducing the time taken to produce each phone from 30 minutes to 15 minutes. Wages for skilled technicians remain the same. At the same time, the government removes a subsidy on electronics manufacturing.
一家智能手机制造商投资了机器人装配线，将每部手机的生产时间从30分钟缩短至15分钟。熟练技术人员的工资保持不变。同时，政府取消了对电子产品制造的补贴。
mprove. However, the removal of the subsidy increases costs, shifting supply back to the left (S1 → S2). The net effect depends on which shock is stronger.
技术进步提高了生产率，使供给曲线右移（S→S1）。单位生产成本降低意味着利润空间改善。然而，取消补贴增加了成本，将供给曲线向左推回（S1→S2）。净效应取决于哪个冲击更强。
In an AQA question asking 'Analyse the impact of automation on the smartphone market', you must use case specifics: 'Time per phone halved' illustrates the productivity gain. You can also mention that quantity supplied will likely increase, and consumers may benefit from lower prices unless the subsidy removal outweighs the tech benefit.
若AQA提问“分析自动化对智能手机市场的影响”，你必须使用案例细节：“每部手机时间减半”说明了生产率的提高。你还可以提到，供给量很可能增加，消费者可能享受到更低的价格，除非补贴取消的影响超过了技术带来的好处。
8. Case Study 6: Alex's Revision vs Football (Opportunity Cost & Trade-offs) | 案例六：亚历克斯的复习与踢球（机会成本与权衡）
Alex has three hours on a Sunday afternoon. He can either revise for his Economics test, play football with his mates, or do a two-hour shift at a local shop earning £5 per hour. He values both football and money. His test is on Monday.
亚历克斯周日下午有三小时。他可以为经济测试复习，或和朋友们踢球，或到本地商店做两小时兼职，每小时赚5英镑。他既看重踢球也看重钱，而测试就在周一。
Scarcity of time is the central problem. If Alex chooses to revise, his opportunity cost is the next-best alternative – perhaps playing football and earning some money? He cannot combine both fully. A trade-off exists between immediate leisure/income and future exam performance.
时间的稀缺性是核心问题。如果他选择复习，机会成本就是次优选择——也许是踢球和赚钱？他无法完全兼顾。眼下的休闲/收入和未来的考试成绩之间存在权衡。
When writing an exam response, you could say: 'The opportunity cost of revising is the £10 he could have earned from the shift, plus the enjoyment of football. However, the long-run benefit of better grades may outweigh this short-run cost.' This shows evaluative thinking.
写考试答案时，你可以这样说：“复习的机会成本是他本可赚到的10英镑，外加踢球的乐趣。然而，更好成绩带来的长远收益可能超过眼前的成本。”这展现了评估性思维。
9. Common Mistakes and How to Avoid Them | 常见错误及如何避免
Mistake 1: Forgetting to define terms. Always start your answer with a clear definition of economics keywords – scarcity, opportunity cost, demand, supply – before applying them.
错误1：忘记下定义。一定要先用清晰的经济关键词定义——稀缺性、机会成本、需求、供给——然后再应用它们。
Mistake 2: Copying large chunks from the case without analysis. You must transform the data into economic reasoning; for example, 'queues on Saturday' means demand exceeds supply, not just 'there were many people'.
错误2：大段照抄案例文字而不作分析。你必须把数据转化为经济学推理；比如，“周六排队”意味着需求超过供给，而不只是“人多”。
Mistake 3: Ignoring the command word. 'Explain' requires reasons and chains of logic; 'Discuss' requires you to present different sides. Underline the command word and plan accordingly.
错误3：忽略指令词。“解释”要求给出理由和逻辑链条；“讨论”要求呈现不同观点。划出指令词并据此规划。
Mistake 4: Not using diagrams. Even if you don't have to draw one, describe the shift in demand or supply verbally. Say 'the demand curve shifts to the right', not just 'demand increases'.
错误4：不使用图形。即使不必画图，也要口头描述需求或供给移动。要说“需求曲线右移”，而不只是“需求增加”。
10. Putting It All Together: Exam Technique | 综合运用：考试技巧
Before the exam, practice with past papers or teacher-made cases. Time yourself: a 4-mark 'Explain' question should take about 5–6 minutes. Read the case twice – once for general understanding, once circling economic triggers like 'limited income', 'price drop', or 'new technology'.
考试前，用往年试卷或老师出的案例来练习。给自己计时：一道4分的“解释”题大约花5–6分钟。案例读两遍——第一遍整体理解，第二遍圈出经济触发词，如“收入有限”“价格下跌”或“新技术”。
Use the WISE structure every time. For a 6-mark 'Analyse' question, you might need two logical chains and a clear concluding statement that refers back to the case. Don't forget to consider 'it depends on...' where appropriate – this shows evaluation, which can move your mark up a band.
每次都用WISE结构。对于一道6分的“分析”题，你可能需要两条逻辑链和一个清晰的总结句，并回扣案例。别忘了在合适的地方考虑“这取决于……”，这能体现评估性，帮助你提高分数档次。
Finally, always check your answer against the case context. Ask yourself: 'Could this answer belong to any case, or is it specific to Sofia, Bean & Brew, or Alex?' The best answers are anchored in the given scenario.
最后，始终对照案例情境检查答案。问自己：“这个答案是否适用于任何案例，还是专门针对索菲亚、Bean & Brew或亚历克斯？”最好的答案都是扎根于给定场景的。
Published by TutorHao | Economics Revision Series | aleveler.com
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