Case Study Practice for Year 7 Economics | 七年级经济学案例分析实战演练

📚 Case Study Practice for Year 7 Economics | 七年级经济学案例分析实战演练

Welcome to this hands-on case study practice, designed especially for Year 7 CAIE Economics students. In this article, we will work through a realistic small business scenario, applying the fundamental concepts you have learned — scarcity, choice, opportunity cost, demand, supply, and market equilibrium. By the end, you will feel confident in breaking down any case study and answering exam-style questions with clarity.

欢迎来到这节动手实践的案例分析课，专为7年级CAIE经济学学生设计。在这篇文章中，我们将通过一个真实的小企业场景，应用你学过的基本概念——稀缺性、选择、机会成本、需求、供给和市场均衡。学完之后，你将有信心拆解任何案例，并清晰地回答考试风格的题目。

1. The Case Study Scenario | 案例背景

Imagine a small bakery called “Daily Rise” located near a secondary school. The owner, Mr Lim, bakes fresh bread, cookies, and cupcakes every morning. He uses flour, sugar, eggs, butter, and an electric oven. The bakery is popular among students and teachers before school starts. However, Mr Lim is facing some decisions: he wants to introduce a new item — chocolate muffins — but this means using his limited time, ingredients, and oven space differently. He also notices that when the weather is rainy, fewer customers visit, but on exam days, many students ask for energy-boosting snacks.

设想一家小型面包店”天天鲜”，位于一所中学附近。店主林先生每天早上烤制新鲜面包、饼干和纸杯蛋糕。他使用面粉、糖、鸡蛋、黄油和一个电烤箱。面包店在课前深受学生和老师的欢迎。然而，林先生面临一些决策：他想推出新品——巧克力马芬，但这意味着要改变他有限的时间、原料和烤箱空间的使用方式。他还注意到，下雨天顾客会减少，但考试日许多学生会要求能补充能量的小吃。

This scenario contains many economic problems and choices. We will analyse them step by step using economic terminology and diagrams where possible. All prices are in Local Currency Units (LCU). Let’s begin!

这个场景包含了许多经济问题和选择。我们将用经济术语和可能的图表逐步分析。所有价格均以本地货币单位（LCU）表示。我们开始吧！

2. Scarcity and the Basic Economic Problem | 稀缺性与基本经济问题

Scarcity is the central economic problem: unlimited wants but limited resources. Mr Lim wants to produce bread, cookies, cupcakes, and now chocolate muffins. However, his resources — flour (he has only 10 kg per day), eggs (30 per day), butter (5 kg), and oven time (4 hours) — are limited. He cannot make an infinite amount of everything. He must decide how to allocate these scarce resources among competing uses.

稀缺性是核心经济问题：无限的需求但有限的资源。林先生想生产面包、饼干、纸杯蛋糕，现在还有巧克力马芬。但他的资源有限——面粉（每天只有10公斤）、鸡蛋（每天30个）、黄油（5公斤）和烤箱时间（4小时）。他无法无限量地生产每一种产品。他必须决定如何将这些稀缺资源分配到互相竞争的用途中。

This is the basic economic problem: What to produce? How to produce? For whom to produce? Mr Lim must answer all three. We will revisit these questions later.

这就是基本经济问题：生产什么？如何生产？为谁生产？ 林先生必须回答这三个问题。我们稍后会回到这些问题。

3. Opportunity Cost and Decision-Making | 机会成本与决策

When Mr Lim chooses to produce more chocolate muffins, he must reduce production of another good, such as cupcakes. The opportunity cost of making one dozen chocolate muffins might be the two dozen cupcakes he could have baked with the same flour, eggs, and oven time. In economics, opportunity cost is the next best alternative forgone.

当林先生选择多生产巧克力马芬时，他必须减少另一种产品的产量，比如纸杯蛋糕。制作一打巧克力马芬的机会成本可能是用相同的面粉、鸡蛋和烤箱时间可以烤制的两打纸杯蛋糕。在经济学中，机会成本是所放弃的次优选择。

To make a rational decision, Mr Lim should compare the expected revenue from chocolate muffins with the revenue from the cupcakes he sacrifices. If muffin demand is high and the price he can charge (say 5 LCU per muffin) exceeds the opportunity cost per muffin, it makes sense to switch some production.

为了做出理性决策，林先生应该比较巧克力马芬的预期收入与所牺牲的纸杯蛋糕收入。如果马芬需求高，且他能收取的价格（比如每个马芬5 LCU）超过每个马芬的机会成本，那么转换部分生产是合理的。

4. Factors of Production in the Bakery | 面包店的生产要素

The resources used by Daily Rise can be classified into the four factors of production:

Land: The natural resources — flour, sugar, eggs, butter, water. These are raw materials from agriculture.
Labour: Mr Lim’s own work effort. He currently works alone, so labour supply is fixed.
Capital: The electric oven, baking trays, mixing bowls, and the shop itself. These are man-made goods used to produce other goods.
Enterprise: Mr Lim as the entrepreneur. He takes the risk, organises the other factors, and makes decisions.

天天鲜所使用的资源可分为四种生产要素：

土地： 自然资源——面粉、糖、鸡蛋、黄油、水。这些是来自农业的原材料。
劳动： 林先生自己的劳动。他目前独自工作，所以劳动供给是固定的。
资本： 电烤箱、烤盘、搅拌碗和店铺本身。这些人造物品用于生产其他商品。
企业家精神： 林先生作为企业家。他承担风险，组织其他要素，并做出决策。

Understanding these factors helps Mr Lim see how he might expand. For example, he could hire an assistant (increase labour) or buy a second oven (increase capital) to produce more muffins without sacrificing all cupcakes.

理解这些要素有助于林先生思考如何扩张。例如，他可以雇一名助手（增加劳动）或购买第二个烤箱（增加资本），以便在不牺牲所有纸杯蛋糕的情况下多生产马芬。

5. Demand for Bakery Products | 面包店产品的需求

Demand is the quantity of a good that consumers are willing and able to buy at different prices. For Daily Rise, the main demand comes from students and teachers. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises.

需求是指消费者在不同价格下愿意并能够购买的商品数量。对于天天鲜来说，主要需求来自学生和老师。需求定律指出，在其他条件不变的情况下，价格降低，需求量增加。

Case evidence shows demand shifts due to non-price factors:

Weather: Rain reduces customer numbers — demand for all fresh bakery items falls (leftward shift of the demand curve).
Exam days: Students seek energy-boosting snacks — demand for high-sugar items like cookies and muffins rises (rightward shift).
Income: If students have more pocket money after holidays, demand increases.
Complementary goods: Demand for doughnuts might increase demand for hot chocolate sold alongside.

案例证据显示需求因非价格因素而变动：

天气： 下雨天顾客减少——对所有新鲜烘焙食品的需求下降（需求曲线左移）。
考试日： 学生需要补充能量的小吃——对曲奇和马芬等高糖产品的需求上升（右移）。
收入： 如果学生假期后零用钱增多，需求会增加。
互补品： 甜甜圈需求增加可能会带动一同售卖的热巧克力需求增加。

Mr Lim can use this knowledge to adjust his production schedule each day. For instance, bake more muffins and cookies before exam week.

林先生可以利用这些知识调整每日生产计划。比如，在考试周前多烤一些马芬和饼干。

6. Supply and Production Decisions | 供给与生产决策

Supply is the quantity producers are willing and able to sell at different prices. The bakery’s supply depends on costs of production, technology, and the goals of the producer. The law of supply says that higher prices lead to higher quantity supplied, ceteris paribus.

供给是指生产者在不同价格下愿意并能够销售的数量。面包店的供给取决于生产成本、技术和生产者目标。供给定律指出，在其他条件不变的情况下，价格越高，供给量越大。

Key supply factors for Daily Rise:

Cost of inputs: If the price of flour rises, it becomes more expensive to make bread. Mr Lim might supply less bread at each price (supply curve shifts left).
Technology: A larger or faster oven would increase the amount he can bake per hour, increasing supply (rightward shift).
Number of sellers: If another bakery opens nearby, the market supply increases, but Mr Lim’s own supply might be unaffected or fall if he loses customers.
Expectations: If he expects higher demand during the school festival, he may prepare more inventory now, increasing current supply.

天天鲜的主要供给因素：

投入成本： 如果面粉涨价，制作面包成本更高。林先生在每个价格水平上可能减少面包供给（供给曲线左移）。
技术： 更大或更快的烤箱会提高每小时产量，增加供给（右移）。
销售者数量： 如果附近新开一家面包店，市场供给增加，但林先生自己的供给可能不受影响，或者如果他失去顾客就会减少。
预期： 如果他预计学校节庆期间需求会增加，他可能会现在多备货，从而增加当前供给。

7. Market Equilibrium and Price Determination | 市场均衡与价格形成

Assume Mr Lim’s bakery operates in a competitive local market. Let’s construct a simple schedule for chocolate muffins. He sets a price and observes how many students buy.

假设林先生的面包店在当地竞争市场中运营。我们来为巧克力马芬建立一个简单的供需表。他设定价格并观察学生的购买情况。

Price per muffin (LCU)	Quantity Demanded (per day)	Quantity Supplied (per day)
3	40	10
4	30	20
5	20	30
6	10	40

From the table, the equilibrium price is 5 LCU where quantity demanded (20) equals quantity supplied (30? Wait, check: at price 5, Qd=20, Qs=30 – that’s a surplus. Let me correct for equilibrium. Actually equilibrium would be where Qd = Qs. From the data, at price 4, Qd=30, Qs=20, shortage. At price 5, Qd=20, Qs=30, surplus. So equilibrium is between 4 and 5, maybe 4.5. But to keep it simple for Year 7, adjust numbers: let’s redesign for equilibrium at 5 with Qd=Qs=25. I’ll redo the table mentally. I’ll make: Price 3: Qd=40, Qs=10; Price 4: Qd=30, Qs=20; Price 5: Qd=25, Qs=25; Price 6: Qd=15, Qs=35. That works.)

从表格看，均衡价格应为5 LCU，此时需求量等于供给量。实际上，如果设定价格5时需求量25等于供给量25，市场出清。让我调整表格：

Price (LCU)	Qd	Qs
3	40	10
4	30	20
5	25	25
6	15	35

At a price of 5 LCU, the quantity demanded equals the quantity supplied at 25 muffins. This is the equilibrium point. If Mr Lim sets the price at 4 LCU, there is a shortage of 10 muffins (30 demanded but only 20 supplied). Queues might form, and some customers would go without. The price would tend to rise. If he sets the price at 6 LCU, there is a surplus of 20 muffins (15 demanded, 35 supplied). Unsold muffins would pile up, and he would have to lower the price.

在价格5 LCU时，需求量与供给量相等，均为25个马芬。这就是均衡点。如果林先生定价4 LCU，将出现10个马芬的短缺（需求30，供给仅20）。顾客可能排队，有些人会买不到，价格会自然上升。如果定价6 LCU，则有20个马芬的过剩（需求15，供给35）。未售出的马芬会积压，他必须降价。

This illustrates the price mechanism: prices adjust to clear the market.

这说明了价格机制：价格会调整以出清市场。

8. Price Elasticity of Demand – A Simple Look | 需求价格弹性初探

Elasticity measures how responsive quantity demanded is to a change in price. For Daily Rise, essential items like plain bread might have inelastic demand — even if the price increases a little, students still need breakfast. Luxury items like chocolate muffins might have more elastic demand because students can easily switch to a cheaper cookie.

弹性衡量需求量对价格变化的反应程度。对天天鲜来说，必需品如普通面包可能缺乏弹性——即使价格略微上涨，学生仍需要早餐。而巧克力马芬这样的奢侈享受品需求可能更具弹性，因为学生可以轻易转买更便宜的曲奇。

If Mr Lim raises the muffin price from 5 to 6 LCU, and quantity demanded drops from 25 to 15, we can calculate the percentage change to see how elastic it is. A big drop in quantity sold means elastic demand, so raising price might reduce total revenue. He should be cautious.

如果林先生将马芬价格从5 LCU提高到6 LCU，需求量从25下降到15，我们可以计算百分比变化来看弹性如何。销售量大幅下降意味着需求弹性大，因此提价可能会减少总收入。他需要谨慎。

Price elasticity of demand (PED) formula simplified: PED = % Change in Quantity Demanded ÷ % Change in Price

需求价格弹性（PED）简化公式：PED = 需求量变动百分比 ÷ 价格变动百分比

Although Year 7 students do not need complex calculations, understanding the concept helps in case study analysis.

虽然7年级学生无需复杂计算，但理解这一概念有助于案例分析。

9. Specialisation and Productivity | 专业化与生产率

Mr Lim currently does everything: purchasing, baking, cleaning, and selling. Consider if he hires his niece to handle the sales counter. He would then specialise in baking. Specialisation occurs when individuals concentrate on what they do best. This division of labour can increase productivity — the output per unit of input. He might bake more muffins per hour because he no longer interrupts his work to serve customers.

林先生目前包揽一切：采购、烘焙、清洁和销售。考虑如果他雇侄女负责柜台销售。他就可以专门从事烘焙。专业化是指个人集中做他们最擅长的事情。这种分工可以提高生产率——单位投入的产出。他可能每小时烤出更多马芬，因为不用再中断工作去服务顾客。

However, specialisation requires coordination, and workers may become bored if tasks are repetitive. For a small bakery, moderate specialisation can boost efficiency without much cost.

然而，专业化需要协调，且工人如果重复性劳动可能会感到无聊。对于一个小面包店来说，适度专业化可以提高效率，而成本较低。

10. Applying the Three Economic Questions | 应用三个基本经济问题

Let’s answer the three questions for Daily Rise:

让我们为天天鲜回答这三个问题：

What to produce? Based on demand, Mr Lim should produce a mix of bread (essential, steady demand), cookies and cupcakes (popular), and trial chocolate muffins on days when students have extra money or during exams. He could survey customers to find preferences.
How to produce? Using labour-intensive methods (himself and possibly a helper) and capital (one oven). He could invest in a second oven or ask suppliers for bulk discounts to lower cost of flour.
For whom to produce? Mainly students and teachers willing and able to pay. He could offer a discount for large orders (e.g., class parties). Those with higher ability to pay, like teachers, might buy premium items.

生产什么？ 根据需求，林先生应该生产面包（必需品，需求稳定）、曲奇和纸杯蛋糕（受欢迎），并在学生零用钱多或考试期间试售巧克力马芬。他可以调查顾客偏好。
如何生产？ 使用劳动密集型方式（他自己和可能一个帮手）和资本（一个烤箱）。他可以投资第二个烤箱或要求供应商批量折扣以降低面粉成本。
为谁生产？ 主要面向愿意且有能力支付的学生和老师。他可以为大批量订单（如班级聚会）提供折扣。支付能力较高的老师可能购买高级产品。

The answers depend on the economic system, but Daily Rise operates in a mixed market economy where most decisions are driven by consumer demand and profit motive.

答案取决于经济体制，但天天鲜在一个混合市场经济中运营，大多数决策由消费者需求和利润驱动。

11. Practice Exam-Style Question | 模拟考试练习题

Question: Using the Daily Rise case study, explain one opportunity cost of Mr Lim’s decision to start making chocolate muffins. [4 marks]

问题： 利用天天鲜案例，解释林先生开始制作巧克力马芬决策的一个机会成本。[4分]

Sample answer guidance: One opportunity cost is the cupcakes he could have produced instead. Because resources (flour, eggs, oven time) are scarce, using them for muffins means fewer cupcakes. The next best alternative forgone is the revenue from those sacrificed cupcakes. For example, if he gives up 20 cupcakes selling at 3 LCU each, the opportunity cost is 60 LCU. He must weigh this against the expected extra revenue from muffins.

参考答案指导： 一个机会成本是他本可以生产的纸杯蛋糕。因为资源（面粉、鸡蛋、烤箱时间）是稀缺的，用于马芬意味着减少了纸杯蛋糕。所放弃的次优选择是那些牺牲的纸杯蛋糕的收入。例如，如果他放弃了20个纸杯蛋糕，每个售价3 LCU，机会成本就是60 LCU。他必须权衡这与来自马芬的预期额外收入。

Try writing your own answer, making sure to define opportunity cost and apply it directly to the bakery’s resources and the specific goods involved.

你可以尝试自己写答案，确保定义机会成本，并将其直接应用于面包店的资源和涉及的具体产品。

12. Key Takeaways for Case Study Success | 案例分析成功要点

When tackling a case study in Year 7 Economics, remember these steps:

Read the scenario carefully and underline resource constraints and decisions.
Identify economic concepts: scarcity, choice, opportunity cost, factors of production, demand, supply, price.
Explain using ‘because’ and link to data from the case.
Use diagrams (demand and supply curves) where possible — even a sketch helps.
For opportunity cost, always refer to the next best alternative given up.
Think about changes over time: shifts in demand and supply due to external factors.
Short structured answers: definition, application, analysis.

在做7年级经济学案例分析时，记住以下步骤：

仔细阅读情境，划出资源约束和决策点。
识别经济学概念：稀缺性、选择、机会成本、生产要素、需求、供给、价格。
用“因为”来解释，并联系案例中的数据。
尽可能使用图表（供需曲线），哪怕是一个草图也很有帮助。
谈机会成本时，始终提及放弃的次优选项。
思考随时间的变化：外部因素引起供需曲线的移动。
简短结构化答案：定义、应用、分析。

Practice regularly with different small business scenarios, and you will master the skill.

用不同的小企业场景定期练习，你将掌握这一技能。

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Case Study Practice for Year 7 Economics | 七年级经济学案例分析实战演练