📚 Year 7 Edexcel Economics: Case Study Practice Session | 案例分析实战演练
Case studies are a powerful way to apply economic concepts to real-life situations. In this practice session, we will explore a school talent show event to understand scarcity, choice, opportunity cost, and market forces. Let’s dive into the decision-making process step by step.
案例分析是将经济概念应用于现实情境的有效方式。在本次实战演练中，我们将通过一个学校才艺表演活动来理解稀缺性、选择、机会成本和市场力量。让我们逐步深入决策过程。
1. Case Background | 案例背景
Greenfield School has decided to organize a talent show to raise funds for the library. The student council has a fixed budget of £100, donated by the parent-teacher association. The event must be planned within four weeks, and only 10 student volunteers are available to help.
绿野学校决定举办一场才艺表演，为图书馆筹集资金。学生会拥有家长教师协会捐赠的固定预算100英镑。活动必须在四周内策划完成，且只有10名学生志愿者可以提供帮助。
The goal is to sell tickets to students, teachers, and parents. All proceeds after covering costs will go to buying new books. The council must decide how to spend the budget on items such as decorations, snacks for sale, prizes for performers, and advertising posters.
目标是向学生、教师和家长出售门票。扣除成本后的所有收益将用于购买新书。学生会必须决定如何将预算花在装饰品、售卖零食、表演者奖品和宣传海报等项目上。
2. The Basic Economic Problem | 基本经济问题
Every society, no matter how small, faces the basic economic problem: human wants are unlimited, but the resources available to satisfy those wants are limited. In our school case, the student council wants to create the best talent show possible, yet they only have £100 and limited time.
每个社会，无论多小，都面临基本经济问题：人类的欲望是无限的，但满足这些欲望的资源是有限的。在学校案例中，学生会希望打造一场最精彩的才艺表演，但他们只有100英镑和有限的时间。
This forces them to make choices. Economics is the study of how people make choices under conditions of scarcity. The fundamental questions are: What to produce? How to produce? For whom to produce? Here, the council must answer: What to spend on? How to organize the event? Who will benefit?
这迫使他们做出选择。经济学就是研究人们在稀缺条件下如何做出选择的学科。根本问题是：生产什么？如何生产？为谁生产？在这里，学生会必须回答：把钱花在什么上？如何组织活动？谁将受益？
For Year 7 students, it is important to see that even a small school event illustrates the same principles that apply to a national economy.
对于七年级学生来说，重要的是看到，即使是一个小小的校园活动，也体现了适用于国家经济的相同原理。
3. Scarcity and Resources | 稀缺性与资源
Scarcity means that there are not enough resources to meet all our needs and desires. The resources in this case are referred to as factors of production: land, labour, capital, and enterprise. For the talent show, the factors can be identified as follows:
稀缺性是指没有足够的资源来满足我们所有的需求和欲望。本案例中的资源被称为生产要素：土地、劳动、资本和企业家精神。对于才艺表演，这些要素可识别如下：
Land: the school hall (a natural resource, even if borrowed). Labour: the 10 student volunteers and a supervising teacher. Capital: the £100 budget, microphones, chairs, and the stage. Enterprise: the student council members who take the risk and organize the event.
土地：学校礼堂（即便是借用的，也是一种自然资源）。劳动：10名学生志愿者和一位监督老师。资本：100英镑预算、麦克风、椅子和舞台。企业家精神：承担风险并组织活动的学生会成员。
Because these resources are scarce, the council cannot do everything. They cannot have lavish decorations, unlimited free snacks, and huge cash prizes all at once. They must allocate their limited resources wisely.
因为这些资源是稀缺的，学生会无法面面俱到。他们无法同时拥有奢华的装饰、无限量的免费零食和高额的现金奖励。他们必须明智地分配有限的资源。
4. Choice and Trade-offs | 选择与权衡
A choice is a decision between alternatives. A trade-off occurs when choosing more of one thing means giving up something else. The student council faces several trade-offs: spending on decorations means less money for snacks; booking a professional sound system means fewer prizes; using volunteers to set up the stage means they cannot sell tickets at the same time.
选择是在不同选项之间做出的决定。权衡是指当选择更多某种东西时，意味着放弃其他东西。学生会面临多个权衡：把钱花在装饰上意味着零食资金减少；预订专业音响系统意味着奖品减少；让志愿者搭建舞台意味着他们不能同时售票。
These trade-offs exist because resources have alternative uses. The council must prioritize. They create a list of wants: a red carpet entrance, fairy lights, popcorn machine, medals for winners, colourful flyers. With only £100, they must rank these wants.
这些权衡之所以存在，是因为资源具有多种用途。学生会必须进行优先排序。他们列出需求清单：红地毯入口、仙女灯、爆米花机、获奖者奖牌、彩色传单。但只有100英镑，他们必须对这些需求进行排序。
Understanding trade-offs helps students see that every “yes” to one item is a “no” to another. This is the core of economic decision-making.
理解权衡有助于学生认识到，对某个项目说”是”，就是对另一个项目说”不”。这就是经济决策的核心。
5. Opportunity Cost in Action | 实践中的机会成本
Opportunity cost is the value of the next best alternative foregone when a choice is made. It is not simply all the options given up, only the best alternative. In the talent show, if the council chooses to spend £25 on a popcorn machine, the opportunity cost is the next best item they could have bought with that £25, for example, medals for the winners.
机会成本是指做出某个选择时所放弃的下一个最优选项的价值。它不仅仅是所有放弃的选项，而是最好的那个替代选择。在才艺表演中，如果学生会选择花25英镑购买爆米花机，那么机会成本就是用这25英镑能购买的下一个最优物品，比如给获奖者的奖牌。
Opportunity cost of popcorn machine = Next best alternative given up (e.g., winner medals worth £25)
爆米花机的机会成本 = 放弃的下一个最优选择（例如价值25英镑的奖牌）
Opportunity cost is not always about money. If a volunteer spends three hours decorating the hall, the opportunity cost could be the time they could have spent studying or resting. The concept applies to all scarce resources, including time.
机会成本并不总是与金钱有关。如果一名志愿者花了三个小时装饰礼堂，机会成本可能是他们本可以用来学习或休息的时间。这一概念适用于所有稀缺资源，包括时间。
When the council considers different budget plans, they must ask: “What are we giving up by choosing this?” This thinking ensures they select the option with the lowest opportunity cost relative to the benefit gained.
当学生会考虑不同的预算方案时，他们必须问：”选择这个我们放弃了什么？” 这种思考确保他们选择相对于所获收益而言机会成本最低的方案。
6. Production Possibility Frontier (PPF) | 生产可能性边界
A Production Possibility Frontier (PPF) shows the maximum possible output combinations of two goods or services that can be produced with available resources and technology. In our simplified model, imagine the council can only spend on two categories: snacks and decorations. Assume snacks cost £5 per pack and decorations cost £10 per set.
生产可能性边界（PPF）显示了在可用资源和技术条件下，两种商品或服务的最大可能产出组合。在我们简化的模型中，假设学生会只能把钱花在两类物品上：零食和装饰品。假设每包零食5英镑，每套装饰品10英镑。
With the full £100 budget, the extreme points are: either 20 packs of snacks and 0 decoration sets, or 0 snacks and 10 decoration sets. Points between these extremes show trade-offs, such as 10 packs of snacks and 5 decoration sets. The slope of the PPF represents the opportunity cost: to get one more decoration set (costing £10), they must give up 2 packs of snacks (£5 each).
在全部100英镑预算下，极值点是：要么20包零食和0套装饰品，要么0包零食和10套装饰品。这些极端点之间的点表示权衡，例如10包零食和5套装饰品。PPF的斜率代表机会成本：要获得一套额外的装饰品（需要10英镑），必须放弃2包零食（每包5英镑）。
If the council operates inside the PPF curve, it means resources are not used efficiently, perhaps because volunteers are idle or some budget is unspent. Points outside the PPF are unattainable with the current resources. The goal is to produce on the frontier to achieve efficiency.
如果学生会在PPF曲线内部运营，意味着资源未能有效利用，可能是因为志愿者闲置或部分预算未使用。PPF之外的点在当前资源下无法实现。目标是在边界上生产以实现效率。
7. Demand for Talent Show Tickets | 才艺表演门票的需求
Demand refers to the quantity of a good or service that consumers are willing and able to buy at various prices over a period of time. For the talent show, the product is the ticket. A survey reveals the following demand schedule among the 150 students expected to attend:
需求是指消费者在一段时间内，在不同价格水平下愿意且能够购买的商品或服务数量。对于才艺表演，产品就是门票。一项调查揭示了预计出席的150名学生中的需求表：
At a price of £1 per ticket, 140 students are willing to buy. At £2, demand is 100 tickets. At £3, demand drops to 80. At £4, only 50 students would attend. This shows the law of demand: as price rises, quantity demanded falls, ceteris paribus (all other things being equal).
当票价为1英镑时，140名学生愿意购买。票价为2英镑时，需求量为100张。3英镑时，需求量降至80张。4英镑时，只有50名学生愿意参加。这体现了需求定律：在其他条件不变的情况下，价格上升，需求量下降。
Factors that could shift the entire demand curve include: changes in student income (pocket money), popularity of the performers, substitute events (a football match on the same day), and advertising. A successful poster campaign could increase demand at every price level, shifting the curve to the right.
可能导致整条需求曲线移动的因素包括：学生收入（零花钱）的变化、表演者的受欢迎程度、替代活动（同天的足球赛）以及广告宣传。一场成功的海报宣传活动可能会在每个价格水平上增加需求，使曲线向右移动。
8. Supply of Talent Show Experiences | 才艺表演体验的供给
Supply is the quantity of a product that producers are willing and able to offer for sale at different prices. In this scenario, the “supply” refers to the number of performance slots or seats available. The school hall can hold a maximum of 120 audience members, so the number of tickets supplied is fixed at 120 regardless of price, making supply perfectly inelastic.
供给是指生产者在不同价格水平下愿意且能够提供销售的产品数量。在这个场景中，”供给”指的是可提供的表演名额或座位数量。学校礼堂最多容纳120名观众，因此无论价格如何，门票供给量固定为120张，这使得供给完全无弹性。
However, the supply of performances itself is influenced by incentives. If performers are not paid, only 10 students volunteer to perform. But if the council offers a small prize or recognition, the number of performers might increase to 20. This shows that non-monetary incentives affect supply as well.
然而，表演本身的供给受到激励的影响。如果表演者没有报酬，只有10名学生自愿表演。但如果学生会提供小额奖品或表彰，表演者数量可能会增加到20人。这表明非货币激励也会影响供给。
On the ticket supply side, the fixed seating capacity means the council cannot supply more than 120 tickets. Therefore, if demand at a given price exceeds 120, there will be a shortage, and some students will be unable to attend.
在门票供给方面，固定的座位容量意味着学生会无法提供超过120张门票。因此，如果在某一价格下需求超过120张，就会出现短缺，一些学生将无法参加。
9. Market Price Determination | 市场价格的确定
The equilibrium price is where the quantity demanded equals the quantity supplied. With a fixed supply of 120 seats and the demand schedule from earlier, we can find the equilibrium. At £2 per ticket, demand is 100 tickets, which is below the 120 supply, so there is a surplus of seats. At £1, demand is 140 tickets, creating a shortage of 20 seats.
均衡价格是指需求量等于供给量的价格。根据之前的需求表和固定的120个座位供给，我们可以找到均衡点。在票价2英镑时，需求量为100张，低于120张的供给，因此存在座位过剩。在票价1英镑时，需求量为140张，造成20个座位的短缺。
The equilibrium price would lie somewhere between £1 and £2, where exactly 120 students are willing to pay. Suppose the council estimates that at £1.50, demand will be exactly 120. Then £1.50 is the market-clearing price. Setting the price too high (£3) leaves empty seats and less total revenue; too low (£1) leaves many unhappy students unable to get a ticket.
均衡价格将落在1英镑到2英镑之间，刚好有120名学生愿意购买。假设学生会估计，在1.50英镑时需求量恰好为120张。那么1.50英镑就是市场出清价格。定价过高（3英镑）会留下空座并减少总收入；定价过低（1英镑）则会使许多学生因买不到票而感到不满。
Understanding equilibrium helps the council maximise attendance and revenue, which in turn maximises the funds raised for the library.
理解均衡有助于学生会最大化出席率和收入，从而最大化为图书馆筹集的资金。
10. Cost-Benefit Analysis | 成本收益分析
A cost-benefit analysis involves comparing the expected costs and benefits of a decision. For the talent show, the costs are explicit: £100 budget spent on supplies, plus implicit costs like volunteers’ time and wear on school equipment. Benefits include the enjoyment of the audience and performers, and the money raised for the library.
成本收益分析包括比较一项决策的预期成本和收益。对于才艺表演，成本是显性的：100英镑预算用于物资，加上隐性成本如志愿者的时间和学校设备损耗。收益包括观众和表演者的乐趣，以及为图书馆筹集的资金。
Suppose the council sets the ticket price at £1.50 and sells 120 tickets. Total revenue = 120 × £1.50 = £180. After deducting the £100 costs, the net fund raised is £80. If they also sell snacks earning £30 additional revenue at a cost of £20, the total net benefit becomes £90.
假设学生会将票价定为1.50英镑并售出120张票。总收入 = 120 × 1.50英镑 = 180英镑。扣除100英镑成本后，净筹集资金为80英镑。如果他们再售卖零食，额外收入30英镑，成本20英镑，那么总净收益就是90英镑。
But benefits are not only financial. The talent show builds school spirit, gives students a platform to showcase talents, and provides real-world learning for the council members. These intangible benefits can be compared to the tangible net fund raised.
但收益不仅仅是财务上的。才艺表演营造了校园精神，为学生提供了展示才华的平台，并让学生会成员获得现实学习体验。这些无形收益可以与筹得的有形净资金相比较。
The analysis helps the council decide whether the event is worth organising at all. If the net benefit is positive and the opportunity cost is acceptable, they should go ahead.
这一分析有助于学生会决定该活动是否值得举办。如果净收益为正且机会成本可接受，他们就应当推进。
11. Making the Final Decision | 做出最终决策
After weighing all factors, the student council must make a final choice. They decide to allocate the £100 as follows: £30 for basic decorations, £20 for printing posters, £25 for snacks to sell, £15 for medals, and £10 for a simple sound system rental. This combination was reached by comparing opportunity costs and aiming to maximise total benefit.
在权衡所有因素后，学生会必须做出最终决定。他们决定将100英镑分配如下：30英镑用于基本装饰，20英镑用于印刷海报，25英镑用于待售零食，15英镑用于奖牌，10英镑用于租用简单的音响系统。这一组合是通过比较机会成本并以最大化总收益为目标得出的。
They set the ticket price at £1.50, expecting full capacity. They also plan to sell snacks during intervals. The decision reflects a trade-off between an impressive show and a profitable one, but they feel this balance best serves the library fundraising goal while still being fun.
他们将票价定为1.50英镑，期待满座。他们还计划在幕间休息时售卖零食。这一决定反映了在精彩表演与盈利活动之间的权衡，但他们认为这种平衡最能服务于图书馆筹款目标，同时仍具有趣味性。
This step-by-step decision process mirrors how businesses and governments allocate scarce resources, showing that economics is a practical toolkit for everyday life.
这种循序渐进的决策过程反映了企业和政府如何分配稀缺资源，表明经济学是日常生活的实用工具箱。
12. Extension: Real-World Application | 拓展：实际应用
Now try applying these concepts to a personal context. Imagine you have £20 as a birthday gift and a free Saturday. You want to go to the cinema, buy a book, and have lunch with a friend. However, £20 is not enough for all three. What is your budget? What are the trade-offs? Calculate the opportunity cost of each option.
现在尝试将这些概念应用到个人情境。想象你收到了20英镑生日礼金，有一个空闲的周六。你想去看电影、买本书以及和朋友吃午餐。然而，20英镑不足以满足所有三项。你的预算是什么？权衡是什么？计算每个选项的机会成本。
You can also observe scarcity and choice in your household: parents must decide how to spend the family income on food, rent, entertainment, and savings. Every purchase has an opportunity cost. Start noticing how economic decisions shape everything from school events to national policies.
你也可以在家庭中观察稀缺性和选择：父母必须决定如何将家庭收入花在食物、房租、娱乐和储蓄上。每一笔购买都有机会成本。开始留意经济决策如何塑造从学校活动到国家政策的一切事物。
Learning to think like an economist helps you make better choices and understand the world around you. The talent show case study is just the beginning of your journey in economics.
学会像经济学家一样思考能帮助你做出更明智的选择，并理解周围的世界。才艺表演案例分析只是你经济学旅程的开端。
Published by TutorHao | Economics Revision Series | aleveler.com
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