📚 Case Study Practical Drills | 案例分析实战演练
In KS3 Edexcel Economics, case studies are a great way to see how economic ideas work in the real world. This article will guide you through practical drills to master case study analysis, helping you build skills for exams and everyday decision-making.
在 KS3 爱德思经济学中，案例分析是理解经济概念在现实生活中如何运作的绝佳方式。本文将带你进行实战演练，掌握案例分析技巧，助你备考并提升日常决策能力。
1. Understanding Case Studies | 理解案例分析
A case study in economics is a detailed story about a real or imaginary situation involving people, businesses, or governments making choices. It helps you connect theory to practice.
经济学中的案例分析是关于一个真实或虚构情境的详细故事，涉及个人、企业或政府的决策。它帮助你连接理论与实践。
You will often be given data, charts, or short narratives. Your job is to identify the economic problem, find the key concepts, and suggest solutions.
你通常会看到数据、图表或简短叙述。你的任务是找出经济问题，识别关键概念，并提出解决方案。
2. Identifying Key Economic Concepts | 识别关键经济概念
Begin by scanning the case for words like ‘scarcity’, ‘choice’, ‘cost’, ‘price’, ‘competition’, or ‘tax’. Underline them and link each to a topic you have studied.
首先浏览案例，找出如’稀缺’、’选择’、’成本’、’价格’、’竞争’或’税收’等词语。划出它们，并联系所学的课题。
Common concepts at KS3 include:
KS3 阶段的常见概念包括：
- Needs and wants – 需求与欲望
- Resources and scarcity – 资源与稀缺性
- Supply and demand – 供给与需求
- Opportunity cost – 机会成本
- Market and competition – 市场与竞争
- Government role – 政府角色
If the case mentions a shortage of water, you immediately think of scarcity and supply. If a business lowers its price, think of demand.
如果案例提到水资源短缺，立刻想到稀缺性和供给。如果企业降價，想想需求。
3. The Supply and Demand Framework | 供求框架
Most case studies can be explained using supply and demand. Always ask: What has changed? Is it supply, demand, or both? Draw simple arrow diagrams in your mind.
大多数案例可用供需解释。始终问：什么变了？是供给、需求，还是两者？在脑海中画出简单的箭头图。
For example, if a celebrity wears a new brand of trainers, demand shifts to the right. This leads to higher price and quantity sold.
例如，如果一位名人穿了新品牌运动鞋，需求曲线向右移动。这导致价格和销量上升。
Demand shift right: P ↑, Q ↑
If a storm destroys strawberry farms, supply shifts left. Price rises, but quantity falls.
如果风暴摧毁草莓园，供给曲线向左移动。价格上升，但数量下降。
Supply shift left: P ↑, Q ↓
4. Interpreting Data and Trends | 解读数据和趋势
Case studies often include tables of sales, price changes, or survey results. Look for patterns: Is the number increasing or decreasing? Over what period?
案例常包含销售表、价格变化或调查结果。寻找规律：数字是在上升还是下降？在什么时间段内？
You can use simple phrases like ‘From 2020 to 2023, the demand for smartphones increased by 20%.’ Always link data to a reason.
你可以用简单短语如‘从 2020 到 2023 年，智能手机需求增长了 20%。’始终将数据与原因联系起来。
| Year | Price of E-book (GBP) | E-books Sold |
|---|---|---|
| 2021 | 5.00 | 1,000 |
| 2022 | 4.00 | 1,500 |
| 2023 | 3.50 | 2,100 |
In this table, as price falls, quantity demanded rises. This fits the law of demand.
在此表中，随着价格下降，需求量上升。这符合需求定律。
5. Role of Businesses and Consumers | 企业与消费者的角色
Identify who the decision-makers are. Businesses aim to maximise profit; consumers aim to maximise satisfaction (utility) given their limited income.
识别决策者是谁。企业旨在利润最大化；消费者在有限收入下追求满足感（效用）最大化。
In a case about a coffee shop opening near a school, you may discuss how the business sets prices to attract students, and how students choose between coffee and other drinks.
在关于咖啡店开在学校附近的案例中，你可以讨论企业如何定价吸引学生，以及学生如何在咖啡和其他饮料间选择。
Think about incentives: A discount on reusable cups encourages more consumers to bring their own cups. This is both a business strategy and an environmental decision.
考虑激励：自带杯折扣促使更多消费者自带杯子。这既是商业策略也是环保决策。
6. Government Intervention in Markets | 市场中的政府干预
Governments may impose taxes, give subsidies, or set regulations. In a case study, ask: Why is the government stepping in? What is the intended outcome?
政府可能征税、补贴或制定法规。在案例中问：为何政府介入？预期结果是什么？
For example, a sugar tax on soft drinks aims to reduce consumption and improve health. Draw the supply curve shifting left, price rising, and quantity falling.
例如，对软饮料征收糖税旨在减少消费、改善健康。画出供给曲线左移，价格上升，数量下降。
Subsidies for solar panels make them cheaper for consumers, shifting supply right and increasing the quantity used.
太阳能板补贴使它们对消费者更便宜，供给右移，使用量增加。
Always mention ‘market failure’ if the case involves pollution or unhealthy products. The government corrects the failure.
若案例涉及污染或不健康产品，务必提到‘市场失灵’。政府纠正失灵。
7. Opportunity Cost in Real Scenarios | 现实场景中的机会成本
Every choice involves a trade-off. The next best alternative given up is the opportunity cost. In a case about a student deciding between a part-time job and extra study, the opportunity cost of working is the lost study time and potentially lower grades.
每一次选择都涉及权衡。放弃的次优选项就是机会成本。在关于学生选择兼职还是额外学习的案例中，工作的机会成本是失去的学习时间和可能降低的成绩。
For a government choosing to build a new hospital instead of a new school, the opportunity cost of the hospital is the school not built. Always link this to the idea of scarce resources.
对于政府选择建新医院而非新学校，建医院的机会成本是没有建的学校。始终将其与资源稀缺联系。
8. Examining Market Structures | 考察市场结构
Look at how many firms are in the case and whether products are similar. A market with many small firms selling identical goods (like a farmers’ market) is close to perfect competition.
观察案例中有多少企业，产品是否相似。许多小企业卖相同产品的市场（如农贸市场）接近完全竞争。
If the case mentions a single electricity provider, it is a monopoly. Monopolies can set higher prices and may need regulation.
若案例提到唯一的电力供应商，那就是垄断。垄断可设定较高价格，可能需要监管。
Discuss how competition affects prices, quality, and choice. More competition usually means lower prices and more innovation.
讨论竞争如何影响价格、质量和选择。竞争越多通常意味着价格更低、创新更多。
9. Evaluating Impact and Drawing Conclusions | 评估影响并得出结论
A strong case study answer weighs both pros and cons. Use phrases like ‘On one hand… on the other hand…’ or ‘A short-term benefit is…, but a long-term cost could be…’
一个优秀的案例分析答案会权衡利弊。使用’一方面…另一方面…’或’短期利益是…，但长期成本可能是…’等短语。
When a new shopping centre opens, the local economy gains jobs, but small shops may close. Your conclusion should state your view clearly, backed by evidence from the case.
当新购物中心开业，当地经济获得就业，但小商店可能关闭。结论应清晰阐明观点，并由案例证据支持。
Always answer the question directly. If asked ‘Should the government raise the minimum wage?’, give a balanced evaluation and a final judgement.
始终直接回答问题。若问‘政府应提高最低工资吗？’，给出平衡评估和最终判断。
10. Practice Drill: The Lemonade Stand Case | 实战演练：柠檬水摊位案例
Read the scenario: “Anna runs a lemonade stand outside her house. On sunny days, she sells 40 cups at £0.50 each. On a rainy day, she sells only 10 cups. Her neighbour Ben also opens a stand and charges £0.40.”
阅读场景：‘安娜在自家门外经营柠檬水摊。晴天她以每杯 0.50 英镑卖出 40 杯。雨天只卖出 10 杯。邻居本也开了摊，收费 0.40 英镑。’
Identify concepts: Weather affects demand (sunny shifts demand right, rain shifts left). Ben’s lower price is competition, affecting Anna’s demand. Anna’s opportunity cost of running the stand might be the time she could spend reading.
识别概念：天气影响需求（晴天需求右移，雨天左移）。本的更低价格是竞争，影响安娜的需求。安娜经营摊位的的机会成本可能是她用于阅读的时间。
Suggested solution: Anna could differentiate by offering a loyalty card, or lower her price. She might consider the cost of lemons and sugar – if prices rise, her supply could shift left.
建议方案：安娜可通过提供积分卡来差异化，或降低价格。她可能考虑柠檬和糖的成本——如果价格上涨，她的供给可能左移。
Now you try: Write a short paragraph explaining why Anna’s sales fluctuate, using supply/demand and opportunity cost.
现在试试：写一段短文解释为什么安娜的销量波动，运用供需和机会成本。
11. Practice Drill: New Technology and Demand | 实战演练：新技术与需求
Case: “A new gaming console is launched at £450. Pre-orders sell out in hours. Six months later, a rival company releases a similar console at £350. The first company then cuts its price to £320.”
案例：‘一款新游戏机以 450 英镑发售。预定在几小时内售罄。六个月后，竞争对手推出类似游戏机，售价 350 英镑。第一家公司随后将价格降至 320 英镑。’
Analysis: Initial high demand – perhaps due to hype, limited supply, and new technology. The rival’s entry increases supply of consoles in the market, shifting market supply right, lowering equilibrium price.
分析：初始高需求——可能由于炒作、有限供给和新技术。竞争对手的进入增加了市场上的游戏机供给，使市场供给右移，降低均衡价格。
The first company’s price cut is a response to competition. Evaluate: Consumers win with lower prices and more choice. The first company may lose profit in the short term but could sell more units. Think about innovation and future demand.
第一家公司的降价是对竞争的回应。评估：消费者因更低价格和更多选择而获益。第一家公司短期利润可能受损，但可卖出更多台。考虑创新和未来需求。
12. Tips for Exam Success | 考试成功技巧
Always read the case study twice. First, get the general story. Second, highlight economic terms and figures.
始终阅读案例两遍。第一遍了解大意。第二遍划出经济术语和数字。
Use a clear structure: Point – Evidence – Explanation – Link. State your point, back it with a quote or data from the case, explain the economics, and link back to the question.
使用清晰结构：观点 – 证据 – 解释 – 连结。陈述观点，用案例引用或数据支持，解释经济学原理，连结回问题。
Don’t just describe – analyse. ‘The price went up because demand increased’ is description. ‘The price went up because demand increased, shown by the higher sales at the new price, suggesting the good is in fashion’ is analysis.
不要只描述——要分析。‘价格上升因为需求增加’是描述。‘价格上升因为需求增加，由新价格下更高的销量佐证，表明该商品正流行’是分析。
Time management: Spend a few minutes planning your answer. Leave a few minutes at the end to check for mistakes and add any missing economic terms.
时间管理：花几分钟规划答案。留几分钟在最后检查错误并补充遗漏的经济术语。
Published by TutorHao | Economics Revision Series | aleveler.com
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