📚 Year 11 CIE Economics: Quick Memorization Guide to Key Terms | Year 11 CIE 经济学：关键术语速记指南
Mastering economics starts with the language of the subject. This guide groups all the essential CIE IGCSE Economics terms into logical clusters and provides simple memory hooks, real-world links and clear dual-language explanations. Use it as your daily drill to move from confusion to confidence before the exam.
掌握经济学要从学科语言入手。这份指南将所有 CIE IGCSE 经济学关键术语按逻辑分组，提供简单的记忆钩子、现实世界联系和清晰的双语解释。把它当作每日训练，帮助你在考前从困惑走向自信。
1. The Basic Economic Problem | 基本经济问题
Scarcity means that resources are limited but wants are unlimited, forcing choices. Think of a pizza with only eight slices and ten hungry friends — there is never enough.
稀缺性 指资源有限而欲望无限，迫使人们做出选择。想象一个只有八块切片的比萨却有十个饥饿的朋友——永远不够分。
Opportunity cost is the next best alternative forgone when a choice is made. Remember: 'Opportunity cost is the real cost — the road not taken.'
机会成本 是做出一种选择时所放弃的次优替代方案。记住：“机会成本就是真正的成本——那条没走的路。”
The three basic questions every economy must answer: What to produce? How to produce? For whom to produce? Use the acronym W.H.F. (What, How, For whom).
每个经济体必须回答的三个基本问题：生产什么？如何生产？为谁生产？用缩写 W.H.F. 记忆（What, How, For whom）。
2. Factors of Production & Rewards | 生产要素与报酬
Factors of production are inputs used to produce goods and services: Land (rent), Labour (wages), Capital (interest) and Enterprise (profit). Remember the word CELL: Capital, Enterprise, Land, Labour — each earns rent, wages, interest, profit.
生产要素 是用于生产商品和服务的投入：土地（地租）、劳动力（工资）、资本（利息）和企业精神（利润）。记住单词 CELL：资本、企业、土地、劳动力——各自获得地租、工资、利息、利润。
Land includes all natural resources, not just ground. Picture a forest, oil or a waterfall — nature’s gifts.
土地 包括所有自然资源，不只是地面。想象森林、石油或瀑布——大自然的馈赠。
Capital is human-made aids to production, like machinery, tools, factories. It earns interest, not profit.
资本 是人造的生产辅助品，如机器、工具、工厂。它赚取的是利息，而不是利润。
Enterprise combines the other factors and takes risks. Its reward is profit. Think of the entrepreneur as the chef mixing ingredients.
企业精神 组合其他要素并承担风险。其报酬是利润。把企业家想象成混合食材的厨师。
3. Types of Goods & Services | 商品与服务的类型
Free goods are abundant and have no opportunity cost, like air or sunshine. Since no one has to give up anything to get them, they are free.
免费品 储量丰富，没有机会成本，如空气、阳光。不需要放弃任何东西就能获得，所以是免费的。
Economic goods are scarce and require resources to produce, so they command a price. A smartphone is an economic good because making it uses scarce metals and labour.
经济品 具有稀缺性，需耗费资源生产，因此有价格。一部智能手机是经济品，因为制造它需要稀缺的金属和劳动力。
Private goods are rival and excludable — if you eat a chocolate bar, no one else can. They are provided through markets.
私人品 具有竞争性和排他性——如果你吃了一块巧克力，别人就不能吃了。它们通过市场提供。
Public goods are non-rival and non-excludable, like street lighting or national defence. Use the twin test: 'Can we stop people from using it? Does one person’s use reduce availability?' No and no means public good.
公共品 具有非竞争性和非排他性，如路灯、国防。用双重检验：“我们能阻止别人使用吗？一个人使用会减少可用性吗？”两个否就意味着公共品。
4. Demand and the Demand Curve | 需求与需求曲线
Demand is the quantity consumers are willing and able to buy at different prices over a period. Remember: 'willing AND able' — wanting a Ferrari without money is not demand.
需求 是在一段时间内，消费者在不同价格水平上愿意且有能力购买的数量。记住：“愿意并且有能力”——想要法拉利但没钱，不算需求。
The law of demand states that price and quantity demanded move in opposite directions, assuming ceteris paribus (other things equal). Think of a seesaw: Price ↑ Quantity Demanded ↓.
需求定律 表明，在其他条件不变的情况下，价格与需求量反向变动。想象一个跷跷板：价格 ↑ 需求量 ↓。
A movement along the demand curve is caused by a change in the good’s own price only. Shift of the demand curve is caused by changes in any other factor (income, tastes, price of related goods, etc.). Label it: 'Price moves the dot; factors move the line.'
沿需求曲线的滑动 仅由商品本身价格变化引起。需求曲线的移动 由其他因素变化引起（收入、偏好、相关商品价格等）。口诀：“价格移动点；因素移动线。”
Substitutes: goods that can replace each other (tea and coffee). If the price of coffee rises, demand for tea increases. Complements: goods used together (printers and ink). If price of printers falls, demand for ink rises. Think: 'Subs replace, comps go together.'
替代品：可以互相替代的商品（茶与咖啡）。如果咖啡价格上涨，茶的需求增加。互补品：一起使用的商品（打印机与墨水）。如果打印机价格下降，墨水的需求增加。口诀：“替代品取替，互补品相依。”
5. Supply and its Determinants | 供给及其决定因素
Supply is the quantity producers are willing and able to sell at different prices. The law of supply: price and quantity supplied move in the same direction. Producers are more willing to supply at higher prices because of profit incentive.
供给 是生产者在不同价格上愿意且有能力出售的数量。供给定律：价格与供给量同方向变动。由于利润激励，价格越高，生产者越愿意供给。
Shifts of the supply curve are remembered by the acronym PINTS WC: Productivity, Indirect taxes, Number of firms, Technology, Subsidies, Weather/natural factors, Costs of production. When any of these change, the whole line shifts.
记住供给曲线移动的因素，用缩写 PINTS WC：生产率（Productivity）、间接税（Indirect taxes）、企业数量（Number of firms）、技术（Technology）、补贴（Subsidies）、天气/自然因素（Weather）、生产成本（Costs）。这些因素中任意一个变化，整条线移动。
An indirect tax (like VAT) raises costs, shifting supply left (decrease). A subsidy reduces costs, shifting supply right (increase). Think: 'Tax pushes, subsidy pulls.'
间接税（如增值税）提高成本，使供给曲线左移（减少）。补贴 降低成本，使供给曲线右移（增加）。口诀：“税收推，补贴拉。”
6. Market Equilibrium and Disequilibrium | 市场均衡与非均衡
Market equilibrium occurs where demand equals supply — the price at which there is no tendency to change. At this point, the market clears with no shortage or surplus.
市场均衡 出现在需求等于供给的位置——此时价格没有变化的倾向。在这个点上，市场出清，没有短缺或过剩。
Excess demand (shortage) happens when the price is set below equilibrium. There is pressure for price to rise because buyers compete for limited goods. Excess supply (surplus) occurs when price is above equilibrium; producers lower prices to clear stock.
超额需求（短缺）发生在价格低于均衡水平时。买家争夺有限商品，导致价格上升的压力。超额供给（过剩）发生在价格高于均衡水平时；生产者降价来清库存。
Use the acronym PUPI for market forces: Price Up in excess demand, Price down in excess supply. Then the market returns to equilibrium like a pendulum.
用缩写 PUPI 记市场力量：超额需求时价格上升，超额供给时价格下降。然后市场像钟摆一样回到均衡。
7. Elasticity – Measuring Responsiveness | 弹性——衡量反应程度
Price elasticity of demand (PED) measures how much quantity demanded responds to a change in price. Formula: PED = (% change in Qd) ÷ (% change in P). Use the mnemonic: PED connects Price and Demand.
需求价格弹性（PED） 衡量需求量对价格变化的反应程度。公式：PED = (需求量变化百分比) ÷ (价格变化百分比)。记忆法：PED 连接价格和需求。
- PED > 1: Elastic — demand responds strongly to price changes (luxuries, many substitutes).
- PED < 1: Inelastic — demand changes less than price (necessities, addictives).
- PED = 1: Unitary — change in price leads to proportional change in Qd.
- PED > 1：富有弹性——需求对价格变化反应强烈（奢侈品、有很多替代品）。
- PED < 1：缺乏弹性——需求变化小于价格变化（必需品、成瘾品）。
- PED = 1：单位弹性——价格变化导致需求量同比例变化。
Price elasticity of supply (PES) formula: (% change in Qs) ÷ (% change in P). Key determinant is time — longer periods make supply more elastic as firms can adjust capacity. Think: 'Supply stretches with time.'
供给价格弹性（PES） 公式：(供给量变化百分比) ÷ (价格变化百分比)。关键决定因素是时间——时间越长，供给越有弹性，因为企业能调整产能。口诀：“供给随时间拉伸。”
Income elasticity of demand (YED): % change in demand ÷ % change in income. Normal goods have positive YED, inferior goods have negative YED. Cross elasticity of demand (XED): % change in demand of good A ÷ % change in price of good B. Positive for substitutes, negative for complements.
需求收入弹性（YED）：需求变化百分比 ÷ 收入变化百分比。正常品 YED 为正，低档品 YED 为负。需求交叉弹性（XED）：A 商品需求变化百分比 ÷ B 商品价格变化百分比。替代品为正，互补品为负。
8. Market Failure & Government Intervention | 市场失灵与政府干预
Market failure occurs when the free market does not allocate resources efficiently. Common causes: externalities, public goods, information gaps, monopolies. Think: 'When the invisible hand drops the ball.'
市场失灵 发生在自由市场无法有效配置资源时。常见原因：外部性、公共品、信息不对称、垄断。口诀：“当看不见的手掉球时。”
Negative externality: a cost imposed on a third party who is not part of the transaction (e.g. pollution from a factory). Positive externality: a benefit received by a third party (e.g. education improving social productivity). Use the memory tag: 'Negative spills over as harm, positive spills over as gain.'
负外部性：强加给未参与交易的第三方的成本（如工厂污染）。正外部性：第三方获得的收益（如教育提高社会生产率）。记忆标签：“负外部性溢出危害，正外部性溢出收益。”
Government policies to correct externalities: indirect tax on harmful goods (Pigouvian tax), subsidies on beneficial goods, laws and regulations, tradable pollution permits. Remember T-S-L-T: Tax, Subsidy, Legislation, Tradable permits.
政府纠正外部性的政策：对有害商品征间接税（庇古税），对有益商品给予补贴，法律与法规，可交易污染许可证。记住 T-S-L-T：税、补贴、立法、交易。
9. Macroeconomic Objectives & Indicators | 宏观经济目标与指标
Four main macroeconomic goals: Economic Growth, Low and Stable Inflation, Low Unemployment, Balance of Payments stability. Acronym: GILB (Growth, Inflation, Low unemployment, Balance).
四大宏观经济目标：经济增长、低而稳定的通货膨胀、低失业率、国际收支平衡。缩写：GILB（增长、通胀、低失业、收支）。
GDP (Gross Domestic Product) measures the total value of output produced within a country in a year. Real GDP is adjusted for inflation. Think: 'GDP is the country’s economic engine report.'
GDP（国内生产总值） 衡量一国境内一年内生产的全部产出总价值。实际 GDP 经过通胀调整。口诀：“GDP 是国家经济引擎的报告。”
Inflation is a sustained increase in the general price level. Measured by the Consumer Price Index (CPI). Deflation is a sustained decrease. Use the 'basket' image: CPI tracks the price of a representative basket of goods and services.
通货膨胀 是总体物价水平持续上涨。用消费者价格指数（CPI）衡量。通货紧缩是持续下跌。想象一个“篮子”：CPI 追踪一篮子有代表性的商品和服务的价格。
Unemployment rate hose employed and those actively seeking work. Frictional, structural, cyclical are types.
失业率：(失业人数 ÷ 劳动力总数) × 100。劳动力包括已就业者和积极寻找工作者。类型有摩擦性、结构性、周期性。
10. Fiscal & Monetary Policy Tools | 财政与货币政策工具
Fiscal policy uses government spending and taxation to influence the economy. Government budget can be in surplus, deficit or balanced. Expansionary fiscal policy increases spending or cuts taxes to boost demand.
财政政策运用政府支出和税收来影响经济。政府预算可以是盈余、赤字或平衡。扩张性财政政策增加支出或减税以提振需求。
Monetary policy is controlled by the central bank, managing the money supply and interest rates to achieve price stability. Lower interest rates make borrowing cheaper, encouraging spending and investment.
货币政策由中央银行掌控，通过管理货币供应和利率来实现价格稳定。降低利率使借贷更便宜，鼓励消费和投资。
Use the mnemonic: MONEY = Central bank, FISC = Government. Merging them: Fiscal is taxing and spending; monetary is interest rate tending.
记忆法：货币 = 中央银行，财政 = 政府。合起来：财政是税收与支出；货币是利率的调控艺术。
11. International Trade & Exchange Rates | 国际贸易与汇率
Specialisation occurs when a country concentrates on producing what it makes most efficiently and trades for the rest. Comparative advantage: producing a good at a lower opportunity cost than another country.
专业化 发生在一个国家集中生产自己最高效的商品，并用贸易换取其余商品时。比较优势：以比另一国更低的机会成本生产某种商品。
Exchange rate is the price of one currency in terms of another. Appreciation: currency becomes stronger (buys more foreign currency). Depreciation: currency weakens. Think: 'Appreciate up, depreciate down.'
汇率 是一种货币以另一种货币表示的价格。升值：货币变强（能兑换更多外币）。贬值：货币变弱。口诀：“升值向上，贬值向下。”
Balance of payments: Current Account records trade in goods, services, primary and secondary income. Trade deficit when imports > exports. Surplus when exports > imports.
国际收支：经常账户记录商品、服务、初次和二次收入贸易。进口 > 出口为贸易逆差，出口 > 进口为贸易顺差。
12. Review Quicksheet & Memory Tricks | 复习速查表与记忆窍门
| Term | Memory Hook | 术语 | 记忆钩子 |
|---|---|---|---|
| Scarcity | Pizza with 8 slices for 10 friends | 稀缺性 | 8 块披萨 10 个朋友 |
| Opportunity cost | The road not taken | 机会成本 | 未走的路 |
| Factors of production | CELL (Capital, Enterprise, Land, Labour) | 生产要素 | CELL（资本、企业、土地、劳动力） |
| Law of demand | Seesaw: Price ↑ Qd ↓ | 需求定律 | 跷跷板：价格↑需求↓ |
| Supply shifters | PINTS WC | 供给移动因素 | PINTS WC |
| Market equilibrium | No shortage, no surplus — market clears | 市场均衡 | 无短缺无过剩——市场出清 |
| PED > 1 | Elastic — 'Luxuries stretch' | 需求富有弹性 | 奢侈品有弹性 |
| Negative externality | Pollution spilling over | 负外部性 | 污染溢出 |
| Macro goals | GILB (Growth, Inflation, Low unemp., Balance) | 宏观目标 | GILB |
| Fiscal vs Monetary | Government spending vs interest rates | 财政与货币 | 政府支出 对比 利率 |
The best way to lock in these terms is to write your own definition in English, then repeat it in Chinese, and link each term to a current news story or a picture in your head. When you see 'scarcity', picture a queue outside a shop during a sale. When you see 'interest rate', imagine the cost of borrowing as the price of time. Review daily, and your economic vocabulary will become second nature.
锁定这些术语的最佳方法是先用英文写下自己的定义，再用中文复述，并将每个术语与一则时下新闻或头脑中的图像联系起来。看到“稀缺性”，就想象商店大减价时门外的长队。看到“利率”，就把借贷成本想象成时间的价格。每日复习，你的经济学词汇就会变成第二天性。
Published by TutorHao | Economics Revision Series | aleveler.com
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