📚 Year 11 OCR Economics: Key Terms Memory Guide | Year 11 OCR 经济：词汇术语速记指南
Welcome to your essential quick‑reference for mastering the terminology of Year 11 OCR Economics. Understanding these terms is not just about memorising definitions — it is about seeing the connections between scarcity, markets, government policy and the wider economy. This article groups key terms by topic and provides memorable explanations, bilingual definitions and practical memory hooks so you can recall them under exam pressure.
欢迎来到 Year 11 OCR 经济学必背术语速查指南。掌握这些术语不仅仅是记住定义，更在于看清稀缺、市场、政府政策与整体经济之间的联系。本文按主题将核心词汇分类，提供好记的双语释义和实用的记忆挂钩，帮助你在考试压力下轻松提取知识点。
1. Scarcity and Choice | 稀缺与选择
Scarcity is the fundamental economic problem that resources are limited while human wants are unlimited. It forces individuals, firms and governments to make choices about what to produce, how to produce and for whom to produce.
稀缺是根本的经济问题：资源有限而人的欲望无限。它迫使个人、企业和政府在生产什么、如何生产以及为谁生产上做出选择。
The concept of choice leads directly to opportunity cost. Every time a decision is made, the next best alternative is given up. In OCR exams, you are often asked to identify the opportunity cost from a scenario.
选择的概念直接引出机会成本。每做一个决定，就放弃了次优替代方案。OCR 考试中常要求你从情境中识别机会成本。
Memory tip: Think “SCARCE” — Short supply, Choice required, Alternatives available, Reflect opportunity cost, Constraints everywhere, Economics begins.
记忆法：记住“稀缺就是缺” — 资源缺，就要选，一选就有代价。
2. Factors of Production | 生产要素
The four factors of production are land (natural resources), labour (human effort), capital (man‑made tools and machinery) and enterprise (the willingness to take risks and combine the other factors). Each factor earns a reward: rent, wages, interest and profit respectively.
四种生产要素是土地（自然资源）、劳动（人力投入）、资本（人造工具与机器）和企业家才能（承担风险并组合前三种要素的意愿）。它们的报酬分别为地租、工资、利息和利润。
In OCR questions, you may need to distinguish between physical capital (machines) and human capital (education and skills of workers). Remember that enterprise is the driving force that organises production, not just another kind of labour.
OCR 题目可能会让你区分物质资本（机器）和人力资本（劳动者的知识与技能）。记住企业家才能是组织生产的内驱力，不是普通劳动。
- Land — all natural gifts, e.g. oil, forests, fish stocks
- 土地 — 自然赐予的一切，如石油、森林、渔业资源
- Labour — physical and mental human input
- 劳动 — 人的体力和脑力付出
- Capital — goods used to produce other goods and services
- 资本 — 用于生产其他产品与服务的物品
- Enterprise — risk‑taking and innovation
- 企业家才能 — 承担风险与创新
3. Opportunity Cost and the PPC | 机会成本与生产可能性曲线
Opportunity cost is the value of the next best alternative forgone. It is illustrated on the Production Possibility Curve (PPC), which shows the maximum possible output combinations of two goods an economy can produce given its resources and technology. Points inside the curve represent inefficiency, while movements along the curve show the trade‑off and therefore the opportunity cost.
机会成本是所放弃的次优选择的价值。它可以用生产可能性曲线（PPC）来说明，这条曲线展示了一个经济体在既定资源和技术下能生产的两种商品的最大产量组合。曲线以内的点代表低效率，沿曲线的移动则体现了此消彼长的取舍，也就是机会成本。
A PPC can shift outwards due to an increase in the quantity or quality of resources, representing economic growth. OCR exams may ask you to draw a PPC and explain the significance of a point inside, on or beyond the curve.
PPC 会因资源数量或质量的提高而向外移动，代表经济增长。OCR 考试可能要求你画出 PPC 并解释曲线内、曲线上和曲线外各点的含义。
Opportunity Cost = Sacrificed Output / Gained Output
4. Demand and Supply | 需求与供给
Demand is the quantity of a good or service that consumers are willing and able to buy at each price over a time period. The law of demand states that as price rises, quantity demanded falls, ceteris paribus. Key determinants of demand are tasted as PASIFIC: Population, Advertising, Substitutes' price, Income (for normal and inferior goods), Fashion/tastes, Interest rates (for credit purchases), Complements' price.
需求是在一定时期内消费者在各种价格水平下愿意并且能够购买的商品或服务的数量。需求定律指出，价格上升，需求量下降，假定其他条件不变。影响需求的关键因素可记为 PASIFIC：人口、广告、替代品价格、收入（正常品与低档品）、偏好/时尚、利率（对信贷消费）、互补品价格。
Supply is the quantity producers are willing and able to sell at each price. The law of supply says that higher prices increase quantity supplied. Determinants of supply include costs of production, technology, indirect taxes, subsidies, number of sellers, weather (for agricultural goods) and producer expectations.
供给是生产者在各种价格下愿意且能够出售的数量。供给定律指出价格越高，供给量越大。影响供给的因素包括生产成本、技术、间接税、补贴、卖家数量、天气（对农产品）以及生产者预期。
A market equilibrium occurs where demand equals supply. At this point there is no tendency for price to change. Disequilibrium, such as excess demand (shortage) or excess supply (surplus), pushes price towards equilibrium.
市场均衡发生在需求等于供给之处，此时价格没有变动的趋势。非均衡，如超额需求（短缺）或超额供给（过剩），会使价格向均衡方向移动。
| Term 术语 | Direction 方向 | Quick Hint 速记 |
|---|---|---|
| Demand increase | Price ↑, quantity ↑ | Shift right |
| Supply increase | Price ↓, quantity ↑ | Shift right |
5. Price Elasticity of Demand (PED) | 需求价格弹性
Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price. It is calculated as the percentage change in quantity demanded divided by the percentage change in price. PED is nearly always negative, but we often ignore the sign.
需求价格弹性（PED）衡量需求量对价格变动的敏感程度。计算公式为需求量变动百分比除以价格变动百分比。PED 几乎总是负值，但通常我们忽略符号。
If PED > 1, demand is elastic — a price cut raises total revenue. If PED < 1, demand is inelastic — a price rise increases total revenue. In OCR, you may be asked to use elasticity to explain why a government places heavy taxes on cigarettes (inelastic demand), or why a firm might not raise prices on luxury goods (elastic demand).
若 PED > 1，需求有弹性 — 降价会增加总收益。若 PED < 1，需求缺乏弹性 — 涨价会提升总收益。OCR 考试中可能让你用弹性原理解释为何政府对香烟课以重税（需求缺乏弹性），或为何企业不轻易抬高奢侈品价格（需求富有弹性）。
Memory aid: "Elastic is stretchy — a small price change causes a big quantity change."
助记：“弹性就像皮筋 — 价格轻轻一拉，数量大幅伸缩。”
6. Market Failure | 市场失灵
Market failure occurs when the free market fails to allocate resources efficiently, leading to a net welfare loss. Types of market failure in the OCR syllabus include externalities, public goods, information gaps, and monopolies.
市场失灵指自由市场未能有效配置资源，导致净福利损失。OCR 大纲涉及的市场失灵类型包括外部性、公共品、信息缺失和垄断。
Externalities are spillover effects on third parties. A negative externality (e.g. pollution from a factory) creates over‑consumption and over‑production relative to the social optimum. A positive externality (e.g. vaccination) leads to under‑consumption. Diagrammatically, marginal social cost (MSC) diverges from marginal private cost (MPC).
外部性是对第三方的溢出效应。负外部性（如工厂污染）会导致相对社会最优的过度消费与过度生产。正外部性（如疫苗接种）则导致消费不足。在图形上，边际社会成本（MSC）与边际私人成本（MPC）发生偏离。
Public goods are non‑rival and non‑excludable, such as street lighting. Because people can free‑ride, private firms will not supply them, so the government often steps in.
公共品具有非竞争性和非排他性，如路灯。由于人们可以搭便车，私人企业不愿提供，因此通常由政府介入。
7. Government Intervention | 政府干预
To correct market failures, governments use a mix of policies: indirect taxation (to internalise negative externalities), subsidies (to encourage positive externalities), regulation, tradeable pollution permits, and direct provision of public goods.
为纠正市场失灵，政府采用组合政策：间接税（将负外部性内部化）、补贴（鼓励正外部性）、监管、可交易的排污许可证以及直接提供公共品。
Be ready to evaluate: taxes may be regressive and hard to set at the right level; subsidies cost the government revenue; regulation can be costly to enforce. OCR mark schemes reward a balanced discussion of effectiveness and drawbacks.
你需要做好评价准备：税收可能具有累退性且难以精准设定；补贴耗费财政资金；监管执行成本高。OCR 评分标准鼓励针对有效性与缺点进行平衡讨论。
Synoptic link: Government intervention connects with macroeconomic objectives, because spending and taxes influence the whole economy.
跨专题连接：政府干预与宏观经济目标相关，因为支出和税收会影响整个经济。
8. Macroeconomic Objectives | 宏观经济目标
The UK government generally pursues four main macroeconomic objectives: stable economic growth, low and stable inflation (CPI target of 2%), low unemployment, and a satisfactory balance of payments on current account. Additionally, protecting the environment and reducing inequality may also feature.
英国政府通常追求四大宏观经济目标：稳定的经济增长、低且稳定的通胀（CPI 目标为 2%）、低失业率以及令人满意的经常账户收支。此外，保护环境与减少不平等也可能作为附加目标。
Gross Domestic Product (GDP) is the value of all final goods and services produced within a country in a year. Real GDP strips out inflation. Use the formula: GDP = C + I + G + (X − M) (consumption, investment, government spending, net exports).
国内生产总值（GDP）是一国一年内生产的所有最终产品与服务的价值。实际 GDP 剔除了通胀因素。使用公式：GDP = C + I + G + (X − M)（消费、投资、政府支出、净出口）。
OCR frequently asks about conflicts between objectives: for example, rapid growth may cause inflation and worsen the current account. You should be able to illustrate trade‑offs using the Phillips curve idea.
OCR 常考目标之间的冲突：例如，快速增长可能引发通胀并恶化经常账户。你应当能用菲利普斯曲线的思维说明这种取舍。
9. Fiscal and Monetary Policy | 财政与货币政策
Fiscal policy uses government spending and taxation to influence the economy. Expansionary fiscal policy (higher spending or lower taxes) aims to boost aggregate demand during a recession. Contractionary fiscal policy (spending cuts or tax rises) cools an overheated economy. The budget deficit is the amount by which government expenditure exceeds tax revenue.
财政政策通过政府支出与税收影响经济。扩张性财政政策（增加支出或减税）旨在衰退时提振总需求。紧缩性财政政策（削减支出或加税）则为过热经济降温。预算赤字是政府支出超过税收收入的金额。
Monetary policy is managed by the Bank of England and involves changing the base interest rate and quantitative easing to control inflation and support growth. A lower base rate encourages borrowing and spending; a higher base rate does the opposite.
货币政策由英格兰银行管理，通过调整基准利率和量化宽松来控制通胀并支持增长。降低基准利率鼓励借贷与消费，升高利率则产生相反作用。
Exam technique: When describing policy, always mention the transmission mechanism — e.g. lower rates → cheaper mortgages → higher consumer spending → increased GDP.
答题技巧：描述政策时，务必提及传导机制 — 例如：降息 → 房贷变便宜 → 消费增加 → GDP 上升。
10. International Trade and Globalisation | 国际贸易与全球化
Comparative advantage explains why countries benefit from trade even if one country is more efficient in producing all goods. It means specialising in producing goods with the lowest opportunity cost. Absolute advantage is when a country can produce more of a good with the same resources.
比较优势解释了为何即使一国在所有商品生产上都更高效，贸易仍然有利可图。它指专门生产机会成本最低的商品。绝对优势则指一国用同样资源能生产更多某种商品。
Free trade brings benefits: lower prices, greater variety, economies of scale, and technology transfer. However, it can also cause structural unemployment and worsen income inequality within countries. Protectionism — tariffs, quotas, subsidies, and non‑tariff barriers — shields domestic industries but is often detrimental to efficiency and consumers.
自由贸易带来好处：价格更低、品种更多、规模经济以及技术转移。然而，它也可能造成结构性失业和国内收入不平等加剧。保护主义 — 关税、配额、补贴和非关税壁垒 — 庇护本国产业，但往往损害效率和消费者利益。
OCR keyword: Trading bloc — a group of countries that reduce trade barriers between themselves, e.g. the EU single market.
OCR 关键词：贸易集团 — 相互降低贸易壁垒的国家集团，例如欧盟单一市场。
11. Exchange Rates | 汇率
The exchange rate is the price of one currency in terms of another. A depreciation of the pound makes UK exports cheaper and imports more expensive, potentially improving the current account. An appreciation makes exports dearer and imports cheaper.
汇率是一种货币以另一种货币表示的价格。英镑贬值使英国出口更便宜、进口更昂贵，可能改善经常账户。升值则使出口变贵、进口变便宜。
Exchange rates are determined in the foreign exchange market by the demand for and supply of the currency. Key influences include interest rates, inflation differentials, speculation and the state of the economy. OCR expects you to explain how a change in the exchange rate affects the macroeconomic objectives.
汇率在外汇市场上由货币的供需决定。主要影响因素包括利率、通胀差异、投机以及经济状况。OCR 期望你解释汇率变动如何影响宏观经济目标。
Memory trick: "SPICED" — Strong Pound Imports Cheaper, Exports Dearer.
记忆窍门：“SPICED”— 强势英镑，进口便宜（Cheaper Imports），出口昂贵（Dearer Exports）。
12. Essential Terminology Toolkit and Exam Tips | 核心术语工具箱与考试技巧
Revise actively by grouping terms into families rather than reading them in isolation. For instance, all elasticity terms — PED, PES, YED, XED — share a common logic of percentage change. Linking terms to real‑world examples (e.g. petrol prices for inelastic demand, bus services for public goods) strengthens recall.
主动复习时，应将术语归类，而非孤立记忆。例如，所有弹性术语 — PED、PES、YED、XED — 都有共通的百分比变动逻辑。将术语与实际事例挂钩（如汽油价格对应无弹性需求，公交服务对应公共品）能加深记忆。
In OCR exam papers, definitions alone usually earn only 1–2 marks; to access higher marks you must apply the term to the given context and analyse lain the effects with economic logic → evaluate, considering other factors or policy trade‑offs.
在 OCR 试卷中，仅凭定义通常只能得 1–2 分；要冲击高分，你必须把术语应用到给定情境并分析其后果。采用推理链条：定义术语 → 套用到数据上 → 用经济逻辑解释影响 → 评价，兼顾其他因素或政策取舍。
- Scarcity: Always starts the economic problem.
- 稀缺：一切经济问题的起点。
- Externalities: Look for third‑party effects in case studies.
- 外部性：案例研究中留意第三方效应。
- Real values: Adjusted for inflation; crucial for comparisons.
- 实际值：剔除了通胀因素；对于比较至关重要。
- Equilibrium: Focus on the process of how prices move, not just the point.
- 均衡：关注价格移动的过程，而不仅仅是均衡点。
- Trade‑off: Every policy has an opportunity cost.
- 取舍：每一项政策都有机会成本。
Published by TutorHao | Economics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图