📚 Year 11 SQA Economics: Key Terminology Quick-Memorisation Guide | Year 11 SQA 经济：关键术语速记指南
Mastering economic terminology is the first step to success in your SQA Economics exam. This guide breaks down the must-know terms for Year 11 students, making them easy to remember with concise definitions, real-world connections, and clever memory hooks. By internalising these concepts, you will be equipped to tackle both knowledge-based questions and higher-order application tasks with confidence.
掌握经济学术语是你在 SQA 经济考试中取得成功的第一步。本指南为 Year 11 学生拆解了必备术语，通过简洁的定义、与现实的联系以及巧妙的记忆方法，帮助你轻松牢记。内化这些概念后，你将能够自信地应对知识型问题和更高层次的应用任务。
1. The Basic Economic Problem: Scarcity and Choice | 基本经济问题：稀缺性与选择
The fundamental economic problem arises because resources are finite, yet human wants are infinite. This condition is known as scarcity. Because everything we desire cannot be produced simultaneously, we must constantly make choices.
基本经济问题源于资源的有限性与人类欲望的无限性。这种状况被称为稀缺性。由于我们无法同时生产出所有渴望之物，我们必须不断做出选择。
These choices force us to answer three key questions: What to produce? How to produce? For whom to produce? Every society, regardless of its wealth, faces the same dilemma of allocating scarce resources among competing uses.
这些选择迫使我们回答三个关键问题：生产什么？如何生产？为谁生产？每个社会，无论贫富，都面临着如何在竞争性用途之间分配稀缺资源的相同困境。
A quick way to remember the core tension is the phrase "infinite wants collide with finite means." When you write about any economic decision, always link it back to scarcity to demonstrate your grasp of the foundation.
快速记忆这一核心张力的方法是记住 "无限的欲望与有限的手段相碰撞"。在论述任何经济决策时，总是将其联系回稀缺性，以展示你对基本原理的掌握。
2. Opportunity Cost and Trade-offs | 机会成本与权衡取舍
Opportunity cost is the value of the next best alternative foregone when a choice is made. It is not simply the monetary cost, but the benefit lost from the option you did not select. For instance, if a government spends £50 million on a new hospital, the opportunity cost might be the school it cannot now build.
机会成本是指在做出选择时所放弃的次优替代方案的价值。它不仅仅是货币成本，更是你未选择的那项选择所失去的收益。例如，如果政府花费 5000 万英镑修建新医院，其机会成本可能就是现在无法建造的那所学校。
A closely related term is trade-off, which describes the idea that to gain more of one thing, you must accept less of another. The production possibility frontier (PPF) illustrates both concepts visually. Points inside the curve show inefficient use of resources; moving along the curve shows trade-offs and opportunity costs.
与之紧密相关的术语是权衡取舍，它描述了这样一种理念：要获得更多的某种东西，就必须接受更少的另一种东西。生产可能性边界 (PPF) 视觉化地展示了这两个概念。曲线内部的点表示资源利用无效率；沿曲线移动则显示了权衡取舍和机会成本。
Memory tip: In any exam question asking "What is the true cost?", always supply at least two alternatives: the explicit choice and the next best option surrendered. Link these with the word "instead".
记忆提示：在任何询问 "真实成本是什么？" 的考试问题中，总是提供至少两个选项：明确的选择和被放弃的次优方案。用 "而非" 将它们连接起来。
3. Factors of Production and Their Rewards | 生产要素及其报酬
All goods and services are produced using four factors of production: Land, Labour, Capital, and Enterprise. Use the acronym "C.E.L.L." to remember them in reverse: Capital, Enterprise, Land, Labour.
所有商品和服务都是通过四种生产要素生产出来的：土地、劳动、资本和企业家才能。用首字母缩写 "C.E.L.L." 反向记忆它们：资本 (Capital)、企业家才能 (Enterprise)、土地 (Land)、劳动 (Labour)。
Each factor receives a reward. Land earns rent; labour earns wages or salaries; capital earns interest; and enterprise earns profit. These rewards are the incomes that flow to households, making the link between production and the circular flow of income.
每种要素都会获得报酬。土地获得地租；劳动获得工资或薪金；资本获得利息；企业家才能获得利润。这些报酬是流向家庭的收入，建立了生产与收入循环流动之间的联系。
Focus on labour: it is both a human input and a source of productivity improvements. Capital, in economics, refers to man-made aids for production such as machinery, not money itself. Enterprise is the risk-taking function that organises the other three factors.
重点关注劳动：它既是人力投入，也是生产率改进的来源。在经济学中，资本指的是用于生产的人造辅助品，如机器，而不是金钱本身。企业家才能则承担风险，将其他三种要素组织起来。
4. Demand: Law and Determinants | 需求：定律及其决定因素
The law of demand states that, ceteris paribus, as the price of a good rises, the quantity demanded contracts, and vice versa. This inverse relationship generates a downward-sloping demand curve. The income effect and substitution effect explain why consumers act this way.
需求定律指出，在其他条件不变的情况下，商品价格上升，需求量则会收缩，反之亦然。这种反向关系形成了一条向下倾斜的需求曲线。收入效应和替代效应解释了消费者为何如此行事。
When the price of the good itself changes, we move along the demand curve (extension or contraction). When any other determinant alters, the entire demand curve shifts to the right (increase) or left (decrease). These shift factors include: consumer income, tastes and preferences, the price of substitutes and complements, population size, and future price expectations.
当商品本身价格发生变化时，我们沿着需求曲线移动（延伸或收缩）。当任何其他决定因素变化时，整条需求曲线会向右（增加）或向左（减少）移动。这些移动因素包括：消费者收入、偏好与品味、替代品和互补品的价格、人口规模以及未来价格预期。
Use the mnemonic "PASIFIC" to recall the shift factors: Population, Advertising, Substitutes' price, Income, Fashion/Tastes, Interest rates (for borrowed purchases), and Complements' price. Practise drawing shifts and explaining the causal chain.
用助记符 "PASIFIC" 来回忆移动因素：人口 (Population)、广告 (Advertising)、替代品价格 (Substitutes' price)、收入 (Income)、时尚/偏好 (Fashion/Tastes)、利率 (Interest rates) 和互补品价格 (Complements' price)。练习绘制曲线移动并解释因果链。
5. Supply: Law and Determinants | 供给：定律及其决定因素
The law of supply shows a direct relationship: as price rises, the quantity supplied expands, ceteris paribus. Higher prices incentivise producers to offer more because profit margins improve. The supply curve therefore slopes upward.
供给定律显示出直接关系：价格上升，供给量扩大，其他条件不变。更高的价格激励生产者提供更多商品，因为利润率提高了。因此，供给曲线向上倾斜。
Movements along the supply curve are caused solely by a change in the good's own price. Shifts of the whole curve arise from changes in: costs of production (wages, raw materials), productivity, indirect taxes and subsidies, technology, the number of suppliers, and weather (especially for agricultural output).
沿供给曲线的移动仅由商品本身价格变化引起。整条曲线的移动则源于以下变化：生产成本（工资、原材料）、生产率、间接税和补贴、技术、供应商数量以及天气（尤其对农产品）。
A reduction in costs or an improvement in technology shifts supply to the right (increase). A rise in costs or the imposition of a tax shifts supply to the left (decrease). Always specify which factor has changed and why that pushes producers to alter output.
成本降低或技术进步使供给向右移动（增加）。成本上升或征税使供给向左移动（减少）。务必明确指出哪个因素发生了变化，以及它为何促使生产者改变产量。
6. Market Equilibrium and Price Mechanism | 市场均衡与价格机制
Market equilibrium occurs at the price where quantity demanded equals quantity supplied. At this point, there is no excess demand (shortage) or excess supply (surplus), and the market clears. The invisible hand of the price mechanism allocates resources without any central planner.
市场均衡发生在需求量等于供给量的价格水平上。此时，不存在超额需求（短缺）或超额供给（过剩），市场出清。价格机制这只看不见的手在没有中央计划者的情况下分配资源。
If price is set above equilibrium, a surplus emerges, putting downward pressure on price. If price is below equilibrium, a shortage arises, pushing price upward. This self-correcting nature is the signalling and incentive function of prices. Prices signal where resources are needed and incentivise producers and consumers to respond.
如果价格设定在均衡水平之上，会出现过剩，给价格带来下行压力。如果价格低于均衡，会出现短缺，推动价格上行。这种自我修正的特性就是价格的信号功能和激励功能。价格指示出哪里需要资源，并激励生产者和消费者做出反应。
ain the adjustment process step by step: surplus → firms cut prices → quantity demanded rises → quantity supplied falls → new equilibrium.
考试技巧：绘制市场图表时，务必标注均衡价格 (Pe) 和均衡数量 (Qe)，并对剩余或短缺区域进行阴影标注或注释。逐步解释调整过程：过剩 → 企业降价 → 需求量上升 → 供给量下降 → 新的均衡。
7. Elasticity: PED, PES, YED | 弹性：需求的价格弹性、供给的价格弹性、需求的收入弹性
Elasticity measures the responsiveness of one variable to a change in another. Three elasticities dominate SQA Economics: Price Elasticity of Demand (PED), Price Elasticity of Supply (PES), and Income Elasticity of Demand (YED). Below is a quick-reference table.
弹性衡量的是一个变量对另一个变量变化的反应程度。三种弹性主导着 SQA 经济考试：需求的价格弹性 (PED)、供给的价格弹性 (PES) 和需求的收入弹性 (YED)。以下是一个快速参考表。
| Elasticity | Formula | Value Interpretation |
|---|---|---|
| PED | %Δ Qd / %Δ Price | |PED| > 1: elastic; |PED| < 1: inelastic; |PED| = 1: unit elastic. |
| 需求的价格弹性 | 需求量变动% / 价格变动% | |PED| > 1 富有弹性；|PED| < 1 缺乏弹性；|PED| = 1 单位弹性。 |
| PES | %Δ Qs / %Δ Price | PES > 1: elastic supply; PES < 1: inelastic supply. |
| 供给的价格弹性 | 供给量变动% / 价格变动% | PES > 1 富有弹性；PES < 1 缺乏弹性。 |
| YED | %Δ Quantity demanded / %Δ Income | YED > 0: normal good; YED < 0: inferior good; YED > 1: luxury. |
| 需求的收入弹性 | 需求量变动% / 收入变动% | YED > 0 正常品；YED < 0 低档品；YED > 1 奢侈品。 |
Remember that determinants of PED include the number of close substitutes, degree of necessity, proportion of income spent, and time period. PES depends mainly on production time, spare capacity, and storability. When asked to evaluate a tax or subsidy, always discuss PED and PES to predict who bears the burden.
请记住，PED 的决定因素包括相近替代品的数量、必需程度、支出占收入的比例以及时间范围。PES 主要取决于生产时间、闲置产能和可储存性。当需要评价一项税收或补贴时，务必讨论 PED 和 PES 来预测谁承担负担。
8. Market Failure and Externalities | 市场失灵与外部性
Market failure occurs when the free market fails to allocate resources efficiently, leading to a net welfare loss. Common causes include externalities, public goods, information gaps, and market power. Externalities are third-party spillover effects not reflected in the market price.
当自由市场无法有效分配资源，导致净福利损失时，就发生了市场失灵。常见原因包括外部性、公共产品、信息缺口和市场势力。外部性是指未反映在市场价格中的第三方溢出效应。
Negative externalities, such as pollution from factories, cause over-production because the social cost exceeds the private cost. Positive externalities, like the benefits of education to wider society, cause under-production because the social benefit exceeds the private benefit. These imbalances create deadweight loss triangles on diagrams.
负外部性，例如工厂污染，导致过度生产，因为社会成本超过私人成本。正外部性，例如教育给更广泛社会带来的益处，导致生产不足，因为社会收益超过私人收益。这些失衡在图示中形成无谓损失三角形。
Government interventions to correct externalities include taxation (Pigouvian tax), subsidies, regulation, and tradable pollution permits. Public goods, such as street lighting, are non-rival and non-excludable, meaning the private sector is unlikely to provide them; this is another classic source of market failure.
政府纠正外部性的干预措施包括征税（庇古税）、补贴、监管和可交易污染许可证。公共产品，如路灯，具有非竞争性和非排他性，意味着私人部门不太可能提供；这是市场失灵的另一个典型来源。
9. Macroeconomic Objectives and Indicators | 宏观经济目标与指标
Governments typically pursue four main macroeconomic objectives: stable low inflation (target usually 2%), low unemployment, sustainable economic growth, and a satisfactory balance of payments. Additional goals include an equitable income distribution and environmental protection.
政府通常追求四大宏观经济目标：稳定且低位的通货膨胀（目标通常为 2%）、低失业率、可持续的经济增长和令人满意的国际收支平衡。其他目标还包括公平的收入分配和环境保护。
Key indicators measure performance. GDP (Gross Domestic Product) measures the total value of output produced within a country in a year. Real GDP strips out inflation to show true growth. The Consumer Price Index (CPI) tracks inflation, while the claimant count and Labour Force Survey monitor unemployment.
关键指标衡量表现。GDP（国内生产总值）衡量一国一年内生产的产出总价值。实际 GDP 剔除了通胀影响以显示真实增长。消费者物价指数 (CPI) 追踪通胀，而申请失业救济人数和劳动力调查则监测失业情况。
Remember the cyclical link: during booms, GDP rises and unemployment falls, but inflation may climb. In recessions, GDP contracts and unemployment rises. The balance of payments on current account records trade in goods, services, and income flows; a persistent deficit may signal competitiveness problems.
记住周期性联系：在经济繁荣期，GDP 上升，失业下降，但通胀可能攀升。在衰退期，GDP 收缩，失业上升。经常账户国际收支记录商品、服务和收入流动；持续性逆差可能表明竞争力问题。
10. Fiscal and Monetary Policy | 财政政策与货币政策
Fiscal policy refers to the government's use of taxation and public spending to influence the economy. Expansionary fiscal policy (lower taxes or higher spending) boosts aggregate demand; contractionary fiscal policy (higher taxes or lower spending) dampens demand.
财政政策是指政府运用税收和公共支出来影响经济。扩张性财政政策（减税或增支）提振总需求；紧缩性财政政策（增税或减支）抑制需求。
A budget deficit occurs when government spending exceeds tax revenue, while a budget surplus is the reverse. The national debt is the accumulation of past deficits. On diagrams, fiscal changes shift the Aggregate Demand (AD) curve, affecting price level and real output.
当政府支出超过税收收入时出现预算赤字，反之则为预算盈余。国债是过往赤字的累积。在图表中，财政变化会使总需求 (AD) 曲线移动，影响价格水平和实际产出。
Monetary policy, managed by the central bank (Bank of England), involves adjusting interest rates and the money supply to keep inflation near target. Lower interest rates make borrowing cheaper, encouraging spending and investment; higher rates cool an overheating economy. The main transmission mechanism works through consumption, investment, and net exports.
由中央银行（英格兰银行）管理的货币政策，涉及调整利率和货币供应量，以使通胀接近目标。降低利率使借贷成本降低，鼓励消费和投资；提高利率则为过热经济降温。主要传导机制通过消费、投资和净出口发挥作用。
11. International Trade and Protectionism | 国际贸易与保护主义
International trade allows countries to specialise according to comparative advantage, increasing global output. Free trade brings lower prices, greater choice, and economies of scale. However, domestic industries may struggle against foreign competition.
国际贸易使各国能够根据比较优势进行专业化，从而增加全球产出。自由贸易带来更低的价格、更多的选择和规模经济。然而，国内产业可能在外国竞争面前挣扎。
Protectionism involves policies that shield domestic producers from foreign competition. Common tools include tariffs (taxes on imports), quotas (physical limits on import volume), and subsidies to domestic firms. Tariffs raise the import price, reducing the quantity of imports and generating government revenue, but they can lead to retaliation.
保护主义涉及保护国内生产者免受外国竞争的政策。常见工具包括关税（对进口品征税）、配额（对进口数量的物理限制）和对国内企业的补贴。关税提高进口价格，减少进口量并产生政府收入，但可能导致报复。
Non-tariff barriers, such as complex regulations and labelling requirements, also restrict trade. Arguments for protectionism include protecting infant industries, preventing dumping, and safeguarding strategic sectors. However, most economists argue that long-term protection reduces efficiency and harms consumers.
非关税壁垒，如复杂的法规和标签要求，也会限制贸易。支持保护主义的论点包括保护幼稚产业、防止倾销和保障战略部门。然而，大多数经济学家认为，长期保护会降低效率并损害消费者利益。
12. Exchange Rates and Balance of Payments | 汇率与国际收支
The exchange rate is the price of one currency in terms of another. It is determined by supply and demand on the foreign exchange market. An appreciation means the currency becomes stronger (buys more foreign currency); a depreciation means it becomes weaker.
汇率是一种货币以另一种货币表示的价格。它由外汇市场上的供求关系决定。升值意味着货币变得更强势（能购买更多外币）；贬值则意味着变得更弱势。
A stronger pound makes UK exports dearer and imports cheaper, potentially worsening the trade balance. A weaker pound makes exports cheaper and imports dearer, which can boost net exports. This relationship is summarised by the acronym "SPICED": Strong Pound Imports Cheaper Exports Dearer.
英镑走强使英国出口更贵、进口更便宜，可能使贸易差额恶化。英镑走弱使出口更便宜、进口更贵，这可以促进净出口。这种关系可用首字母缩写 "SPICED" 概括：强镑——进口便宜出口贵。
The balance of payments records all transactions between a country and the rest of the world. The current account includes trade in goods, trade in services, primary income (investment income), and secondary income (transfers). The capital and financial account records capital
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