Year 8 WJEC Economics: Case Study Practice | Year 8 WJEC 经济：案例分析实战演练

📚 Year 8 WJEC Economics: Case Study Practice | Year 8 WJEC 经济：案例分析实战演练

Case studies are an exciting way to explore how economics works in the real world. In Year 8 WJEC Economics, you will often be given a short story or scenario about a person, a business, or a market. Your job is to use economic ideas like scarcity, choice, opportunity cost, supply and demand to explain what is happening. This guide will help you build confidence by walking through several practical case studies. You will learn how to read a case study, spot the key economic concepts, and write clear, structured answers. Whether you are preparing for a class test or an end-of-year exam, these skills will set you up for success.

案例分析是探索经济学如何在真实世界中运作的一种有趣方式。在 Year 8 WJEC 经济学中，你经常会遇到关于个人、企业或市场的短篇故事或情景。你的任务就是运用稀缺性、选择、机会成本、供给与需求等经济学概念来解释正在发生的事情。本指南将通过解析多个实战案例，帮助你逐步建立信心。你将学会如何阅读案例、识别关键经济概念，并写出结构清晰的答案。无论你是在准备随堂测验还是年终考试，掌握这些技能都会让你离成功更近一步。

1. Why Case Studies Matter | 为什么案例分析很重要

Case studies bring economics to life. Instead of just learning definitions, you see how a farmer decides what to grow, why a teenager chooses between two products, or how a shop responds to a competitor’s price cut. These examples train your brain to think like an economist. The WJEC exam expects you to apply your knowledge, not just repeat it. By practising case studies, you learn to connect theory to real situations, which is a high-level skill that examiners love to reward.

案例分析让经济学变得鲜活起来。你不再只是背诵定义，而是亲眼看到一位农民如何决定种什么、一个青少年如何在两种产品之间做出选择，或者一家商店如何应对竞争对手的降价。这些例子能训练你像经济学家一样思考。WJEC 考试要求你能够应用知识，而不仅仅是复述知识。通过练习案例分析，你将学会把理论与现实情况联系起来，这是一项高阶技能，也是考官们乐于奖励的加分项。

2. Understanding the Scenario | 理解情景

Before you start writing, read the case study carefully. Underline the names, numbers, and any problems mentioned. Ask yourself: Who is making a choice? What resources are limited? What does the person want? For example, a case might say: ‘Anna has £10 to spend. She loves both a cinema ticket (£8) and a new book (£9). She cannot afford both.’ Right away, you know this is about scarcity – money is limited – and she must make a choice. Learning to spot the setting quickly will save you time and help you stay focused.

在动笔之前，先认真阅读案例。划出其中的人名、数字以及所提到的任何问题。问问自己：谁在做选择？什么资源是有限的？这个人想要什么？例如，一个案例可能会说：“安娜有 10 英镑可以花。她既喜欢一张电影票（8 英镑），又喜欢一本新书（9 英镑）。她无法同时负担这两样东西。” 你马上就能看出这涉及稀缺性——钱是有限的——而她必须做出一个选择。学会快速发现情景背景，可以帮你节省时间并保持专注。

3. Identifying Economic Concepts | 识别经济概念

After you understand the story, think about which economic ideas fit. Common concepts for Year 8 include: needs and wants, scarcity, choice, opportunity cost, demand, supply, price, consumers, producers, and specialisation. Make a quick list in the margin. For the Anna example, you will write about scarcity of money, choice between two goods, and the opportunity cost of her decision. If the case involves a lemonade stand, you might talk about production costs, price setting, and profit. Always use the exact terms the syllabus expects – this shows the examiner you know your stuff.

在你理解了故事之后，想一想哪些经济学概念与之匹配。Year 8 常见概念包括：需要与想要、稀缺性、选择、机会成本、需求、供给、价格、消费者、生产者以及专业化。你可以在页边快速列个清单。在安娜的例子中，你会写到金钱的稀缺性、两种商品之间的选择，以及她决策的机会成本。如果案例涉及一个柠檬水摊位，你或许就会谈到生产成本、定价和利润。一定要使用教学大纲要求的确切术语——这就向考官表明你掌握了相关知识。

4. The Chocolate Bar Case: Scarcity and Choice | 巧克力棒案例：稀缺性与选择

Let’s start with a simple case: ‘Tom has 50p. At the school tuck shop, a chocolate bar costs 50p and a pack of mints costs 45p. Tom can only buy one item.’ This is a classic scarcity problem. Tom’s money is a limited resource. His wants are unlimited, but his means are finite. He has to choose. Even though the mints are cheaper, Tom might still prefer the chocolate bar. Economics does not tell him what to choose – it only explains that a choice must be made because of scarcity. In your answer, you would discuss how scarcity forces us to make decisions and list the options available.

让我们从一个简单的案例开始：“汤姆有 50 便士。在学校的小卖部，一条巧克力棒售价 50 便士，一包薄荷糖售价 45 便士。汤姆只能买一件东西。” 这是一个典型的稀缺性问题。汤姆的钱是一种有限的资源。他的欲望是无限的，但他的财力是有限的。他不得不做出选择。即使薄荷糖更便宜，汤姆可能还是更喜欢巧克力棒。经济学并不告诉他应该选择什么——它只是解释，由于稀缺性的存在，必须做出一个选择。在你的答案中，你会讨论稀缺性如何迫使人们做决策，并列出可供选择的选项。

5. Opportunity Cost in Action | 机会成本在行动

Every choice involves a sacrifice. The opportunity cost is the next best alternative you give up. In Tom’s case, if he buys the chocolate bar, his opportunity cost is the pack of mints he could have enjoyed. You should always state the opportunity cost clearly in a case study answer. Imagine a different case: ‘Sarah must choose between going swimming (free) or working a part-time job for two hours at £6 per hour.’ The opportunity cost of swimming is not just the money she could earn (£12), but also the experience and satisfaction of working. Spotting the next best alternative is a skill that will come up again and again.

每一个选择都伴有一种牺牲。机会成本就是你放弃的次优选项。在汤姆的例子中，如果他买了巧克力棒，他的机会成本就是那包他本可以享用的薄荷糖。在案例分析作答时，你应该总是清晰地说明机会成本。想象一下另一个案例：“莎拉必须选择去游泳（免费）还是做一份时薪 6 英镑、时长两小时的兼职工作。” 游泳的机会成本不仅仅是她可以赚到的钱（12 英镑），还包括工作的经历与满足感。能够发现次优选项是一项反复出现的技能。

6. Demand and Supply Analysis | 需求与供给分析

Many case studies look at markets. Demand is the amount of a good or service that consumers are willing and able to buy at different prices. Supply is the amount producers are willing and able to sell. A typical case might say: ‘At a music festival, the only burger van raises its price from £5 to £8. Many people still queue up.’ First, recognise that the van is a supplier. Even though the price rose, demand remained high because there were no close substitutes. This tells you that demand is price inelastic in this situation. When you write your answer, explain what demand and supply mean, then apply them with the evidence from the text.

很多案例分析都着眼于市场。需求是指消费者在不同价格下愿意且能够购买的商品或服务的数量。供给是指生产者愿意且能够出售的数量。一个典型的案例可能会说：“在一个音乐节上，唯一的一辆汉堡售卖车将价格从 5 英镑提高到了 8 英镑。仍然有很多人排队购买。” 首先，要识别出这辆售卖车是一个供给方。尽管价格上涨了，需求仍然很高，因为没有相近的替代品。这告诉你，在这种情况下需求是缺乏价格弹性的。你在写答案时，可以先解释需求和供给的含义，然后结合文本中的证据加以应用。

7. The Market for Smartphones | 智能手机市场案例

Let’s examine this case: ‘A new smartphone model is released at £800. Thousands of people camp outside shops to buy it on the first day. Six months later, the price drops to £600 and a rival brand launches a similar phone at £550.’ What can you say? Initially, demand exceeds supply at the launch price – there is a shortage. The high demand shows strong consumer preference. Later, the price fall may be due to increased supply or a drop in demand. The rival’s lower price introduces competition, which might reduce demand for the first phone. Use a simple table to organise your thoughts:

Stage	What happens	Economic idea
Launch	Long queues, high price	Excess demand
6 months later	Price falls to £600	Increased supply or falling demand
Rival entry	Competitor at £550	Substitute goods effect

让我们分析一下这个案例：“一款新型智能手机以 800 英镑的价格发布。第一天有成千上万的人在商店外露营排队抢购。六个月后，价格降至 600 英镑，同时一个竞争品牌推出了一款售价 550 英镑的类似手机。” 你能解读出什么？起初，在发布价位上需求超过了供给——存在短缺。高需求显示出强烈的消费者偏好。后来，价格回落可能是因为供给增加或需求下降。竞争对手更低的价格带来了竞争，这可能会降低对第一款手机的需求。可以用一个简单的表格来整理思路：

阶段	发生的情况	经济学概念
发布时	长队、高价	超额需求
6 个月后	价格降至 600 英镑	供给增加或需求下降
竞争者进入	竞争者定价 550 英镑	替代品效应

8. Price Changes and Consumer Behaviour | 价格变化与消费者行为

A new case: ‘The local cinema increases ticket prices from £7 to £10 on weekends. Attendance drops by 30%. On weekdays, it offers a £5 deal and ticket sales rise by 50%.’ This shows how price influences the quantity demanded. The weekend drop suggests that demand is price elastic – a price rise led to a larger percentage fall in attendance. The weekday promotion brought in many more customers, showing that a lower price can stimulate demand. When answering, mention the law of demand: all else being equal, as price rises, quantity demanded falls, and vice versa. Support your point with the numbers from the case.

一个新案例：“本地电影院将周末票价从 7 英镑提高到 10 英镑。上座率下降了 30%。在工作日，它推出了 5 英镑的优惠，电影票销量上升了 50%。” 这显示了价格如何影响需求量。周末的上座率下降表明需求是富有价格弹性的——价格上涨导致了更大幅度的上座率百分比下降。工作日的促销活动吸引了更多顾客，表明更低的价格能够刺激需求。在作答时，要提到需求定律：在其他条件不变的情况下，随着价格上涨，需求量会下降，反之亦然。用案例中的数字来支撑你的观点。

9. Producers and Costs | 生产者与成本

Sometimes the case focuses on a business. ‘Jake runs a cupcake stall. Each cupcake costs 40p to make (ingredients, wrappers). He sells them for £1 each. On a rainy day, he sells only 20 cupcakes. On a sunny day, he sells 80.’ First, work out his revenue and profit. On a rainy day, total revenue is 20 × £1 = £20. Total cost is 20 × 40p = £8. Profit = £12. On a sunny day, profit is 80 × 60p = £48. The numbers show how demand affects a producer’s income. You could also discuss fixed costs (stall rental) or the idea of risk. Always link your calculations to the economic story.

有时案例会聚焦于一个企业。“杰克经营一个纸杯蛋糕摊位。每个纸杯蛋糕的制作成本是 40 便士（原料、包装纸）。他以每个 1 英镑的价格出售。在一个下雨天，他只卖了 20 个纸杯蛋糕。在一个晴天，他卖了 80 个。” 首先，计算他的收入和利润。在下雨天，总收入 = 20 × £1 = £20。总成本 = 20 × 40p = £8。利润 = £12。在晴天，利润 = 80 × 60p = £48。这些数字显示了需求如何影响生产者的收入。你还可以讨论固定成本（如摊位租金）或者风险的概念。记得始终将计算与经济故事联系起来。

10. Government Intervention: A Case Study | 政府干预：案例分析

The government sometimes steps into a market. Read this: ‘To reduce childhood obesity, the government places a 20% tax on sugary drinks. After the tax, the price of a can rises from 80p to 96p. Sales fall by 15%.’ This is an example of indirect taxation. The aim is to discourage consumption by making the product more expensive. The fall in sales suggests the policy had some success. In your answer, you can discuss the reasons for intervention (health concerns, costs to the NHS) and the outcome. You might also mention that some consumers still buy the drinks, showing that demand for them is not perfectly elastic. Keep your answer balanced and use the evidence provided.

政府有时会干预市场。来看这则材料：“为减少儿童肥胖，政府对含糖饮料征收 20% 的税。征税后，一罐饮料的价格从 80 便士上涨到 96 便士。销量下降了 15%。” 这是一个间接税的例子。其目的是通过使产品更贵来抑制消费。销量下降表明该政策取得了一定成效。在你的答案中，你可以讨论干预的原因（健康关切、国家医疗服务体系的成本）以及结果。你还可以提到有些消费者仍然购买这些饮料，说明对它们的需求并非完全弹性。保持你的答案均衡，并使用所提供的证据。

11. Applying Data to Cases | 将数据应用于案例

Numbers in a case study are your friends. They make your answer stronger. Always extract the key figures: prices, quantities, percentages, and changes. For example, ‘A newsagent sells 100 magazines a week at £2 each. It raises the price to £2.50 and sells 80.’ Calculate the percentage change in price: (50p ÷ £2) × 100 = 25% increase. The quantity sold fell from 100 to 80, a 20% decrease. Because the percentage fall in quantity (20%) is less than the percentage rise in price (25%), demand is price inelastic. This means total revenue increased: original revenue £200, new revenue £200 (80 × £2.50), so it stayed the same. Practising these calculations will boost your confidence.

案例分析中的数字是你的好帮手，它们能让你的答案更有力。一定要提取出关键数据：价格、数量、百分比以及变化。例如，“一家报刊亭每周以 2 英镑的价格售卖 100 本杂志。它把价格提高到 2.50 英镑，销量变为 80 本。” 计算价格的百分比变化：(50p ÷ £2) × 100 = 25% 的上涨。销售量从 100 降到 80，下降了 20%。因为销售量的百分比降幅 (20%) 小于价格的百分比涨幅 (25%)，所以需求是缺乏价格弹性的。这意味着总收入增加了：原本收入 £200，新收入 £200 (80 × £2.50)，因此它保持不变。练习这些计算会增强你的信心。

12. Tips for Exam Success | 考试成功小贴士

When you face a case study question, follow a simple structure. Step 1: Identify the central economic problem (scarcity, choice, price change, etc.). Step 2: Define the key terms you will use. Step 3: Apply the concepts to the specific details in the case – quote the parts of the text that support your point. Step 4: If there are numbers, use them. Step 5: Conclude by summing up what happens and why. For example, end with ‘Therefore, the increase in price led to a fall in quantity demanded, which is consistent with the law of demand.’ Practice this structure with past papers or sample cases. Time yourself, and always check your answer for clear English and correct spelling.

当你面对一道案例分析题时，要遵循一个简单的结构。第一步：识别出核心的经济问题（稀缺性、选择、价格变动等）。第二步：定义你将要使用的关键术语。第三步：将概念运用到案例的具体细节中——引用文本中支撑你观点的部分。第四步：如果有数字，就用上。第五步：通过总结发生了什么及其原因来收尾。比如，用“因此，价格上涨导致了需求量的下降，这符合需求定律”来结尾。用以往的试卷或案例样题来练习这一结构。给自己计时，并总是检查你的答案，确保英文清晰、拼写正确。

Published by TutorHao | Economics Revision Series | aleveler.com

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