📚 GCSE AQA Economics: Final Revision Notes | GCSE AQA 经济：考前冲刺笔记
These concise revision notes cover the key concepts and definitions you need to master for the AQA GCSE Economics exam. From the basic economic problem to macroeconomic policies, each section provides a quick yet thorough review designed to boost your confidence before the assessment.
这份简洁的冲刺笔记涵盖了你在 AQA GCSE 经济考试中必须掌握的核心概念与定义。从基本经济问题到宏观经济政策，每个部分都提供快速而透彻的复习，旨在考前增强你的信心。
1. The Basic Economic Problem | 基本经济问题
Scarcity arises because resources are finite while human wants are unlimited. This leads to the need for choice and the concept of opportunity cost – the value of the next best alternative foregone. The three fundamental questions every economy must answer are: What to produce? How to produce? For whom to produce?
稀缺性的产生是由于资源有限而人类的欲望无穷。这导致了选择的必要性以及机会成本的概念——所放弃的次优选择的价值。每个经济体必须回答的三个基本问题是：生产什么？如何生产？为谁生产？
Factors of production are classified into four categories: land (natural resources), labour (human effort), capital (man-made goods used in production), and enterprise (the willingness to take risks and organize the other factors).
生产要素分为四类：土地（自然资源）、劳动（人力努力）、资本（用于生产的人造商品）和企业（承担风险并组织其他要素的意愿）。
2. Demand and Supply | 需求与供给
Demand is the quantity of a good or service that consumers are willing and able to purchase at a given price over a period of time. The law of demand states that, ceteris paribus, as price rises, quantity demanded falls. Movements along the demand curve are caused by price changes, while shifts are caused by factors such as income, tastes, prices of substitutes/complements, and advertising.
需求是指在一段时间内，消费者愿意且能够以特定价格购买的商品或服务的数量。需求定律指出，在其他条件不变的情况下，价格上升，需求量下降。沿着需求曲线的移动由价格变化引起，而曲线移动则由收入、偏好、替代品/互补品价格和广告等因素引起。
Supply is the quantity producers are willing and able to sell at a given price. The law of supply: as price rises, quantity supplied rises. Shifts in supply result from changes in costs of production, technology, taxes, subsidies, and external shocks.
供给是指生产者愿意且能够以特定价格出售的数量。供给定律：价格上升，供给量上升。供给移动由生产成本变化、技术、税收、补贴和外部冲击引起。
Equilibrium occurs where demand equals supply. A shift in either curve leads to a new equilibrium price and quantity. Understanding how markets reach equilibrium is foundational.
均衡发生在需求等于供给时。任意一条曲线的移动都会导致新的均衡价格和数量。理解市场如何达到均衡是基础内容。
3. Price Elasticity of Demand (PED) | 需求价格弹性
PED measures the responsiveness of quantity demanded to a change in price. Formula: PED = % change in quantity demanded ÷ % change in price. Use the midpoint method when necessary. Values: If PED > 1, demand is price elastic; if PED < 1, demand is price inelastic; if PED = 1, it is unit elastic; perfect elasticity (∞) and perfect inelasticity (0).
需求价格弹性衡量需求量对价格变化的反应程度。公式：PED = 需求量变化的百分比 ÷ 价格变化的百分比。必要时使用中点法。数值：若 PED > 1，需求富有价格弹性；若 PED < 1，需求缺乏价格弹性；若 PED = 1，单一弹性；完全弹性（∞）和完全无弹性（0）。
Determinants include the number and closeness of substitutes, whether the good is a necessity or luxury, the proportion of income spent, and time period. Firms use PED to predict revenue changes: if demand is elastic, raising price reduces total revenue; if inelastic, raising price increases total revenue.
影响因素包括替代品的数量和接近程度、商品是必需品还是奢侈品、支出占收入的比例以及时间长短。企业利用 PED 预测收入变化：如果需求富有弹性，提价会减少总收入；如果缺乏弹性，提价会增加总收入。
4. Price Elasticity of Supply (PES) | 供给价格弹性
PES measures responsiveness of quantity supplied to a price change. PES = % change in quantity supplied ÷ % change in price. Values: PES > 1 elastic supply; PES < 1 inelastic supply. Key determinants: production time, availability of spare capacity, stock levels, and barriers to entry.
供给价格弹性衡量供给量对价格变化的反应程度。PES = 供给量变化百分比 ÷ 价格变化百分比。数值：PES > 1 供给弹性；PES < 1 供给无弹性。关键决定因素：生产时间、闲置产能的可用性、库存水平和进入壁垒。
Agricultural goods often have inelastic supply in the short run because output cannot quickly respond to price changes. Manufactured goods with flexible production lines tend to be more price elastic.
农产品在短期通常供给缺乏弹性，因为产出无法快速响应价格变化。拥有柔性生产线的制成品往往供给弹性更大。
5. Market Failure | 市场失灵
Market failure occurs when the price mechanism leads to an inefficient allocation of resources. Types include: externalities (positive and negative), public goods, merit and demerit goods, and information asymmetries. Negative production externalities (e.g., pollution) lead to overproduction, while positive consumption externalities (e.g., vaccinations) lead to underconsumption in free market.
市场失灵指价格机制导致资源配置无效率。类型包括：外部性（正和负）、公共物品、有益品和有害品以及信息不对称。负生产外部性（如污染）导致过度生产，而正消费外部性（如疫苗接种）则导致自由市场中消费不足。
Government intervention to correct market failure includes taxation (Pigouvian tax on negative externalities), subsidies, regulation, provision of public goods, and information campaigns. Evaluate effectiveness, unintended consequences, and government failure.
政府纠正市场失灵的干预措施包括税收（对负外部性征收庇古税）、补贴、监管、提供公共物品和信息宣传。要评估有效性、意外后果和政府失灵。
6. The Labour Market | 劳动力市场
Wages are determined by the interaction of demand for labour (derived demand from the product market) and supply of labour (affected by working-age population, migration, non-wage benefits). Factors influencing elasticity of labour demand and supply. Trade unions can push wages above equilibrium, potentially causing unemployment if wages are sticky downwards.
工资由劳动力需求（来自产品市场的派生需求）和劳动力供给（受劳动年龄人口、移民、非工资福利影响）的相互作用决定。影响劳动力需求和供给弹性的因素。工会可能将工资推高至均衡水平以上，若工资粘性向下，可能导致失业。
National minimum wage (or living wage) aims to reduce poverty but can lead to excess supply of labour (unemployment) if set above the equilibrium. The impact depends on the elasticity of demand for labour in the affected industries.
国家最低工资（或生活工资）旨在减少贫困，但如果设定在均衡水平以上，则可能导致劳动供给过剩（失业）。其影响取决于受影响行业劳动力需求的弹性。
7. Government Macroeconomic Objectives | 政府宏观经济目标
Main objectives: economic growth (steady increase in real GDP), low and stable inflation (target 2% CPI), low unemployment, and a sustainable balance of payments on current account. Additional objectives may include reducing income inequality and environmental sustainability.
主要目标：经济增长（实际 GDP 稳定增长）、低且稳定的通胀（目标 CPI 2%）、低失业率以及可持续的国际收支经常账户平衡。其他目标可能包括减少收入不平等和环境可持续性。
Potential conflicts exist between objectives, such as growth vs. inflation (boom times may cause demand-pull inflation) and growth vs. a balanced current account (higher incomes may suck in imports). Policymakers must prioritize and manage trade-offs.
目标之间存在潜在冲突，例如增长与通胀（繁荣时期可能引发需求拉动型通胀）以及增长与经常账户平衡（收入增加可能吸进更多进口）。政策制定者必须排定优先级并管理权衡取舍。
8. Economic Growth and GDP | 经济增长与GDP
GDP measures the total value of goods and services produced in an economy in a year. Real GDP adjusts for inflation. Economic growth can be driven by increases in the quantity/quality of factors of production. Benefits: higher living standards, increased employment. Costs: environmental damage, inflation, inequality.
GDP 衡量一个经济体在一年内生产的商品和服务的总价值。实际 GDP 剔除了通胀影响。经济增长可由生产要素数量/质量的增加驱动。好处：更高的生活水平、增加就业。成本：环境破坏、通货膨胀、不平等。
The distinction between short-run growth (using spare capacity) and long-run growth (expanding productive potential, often shown by a rightward shift in the PPF/LRAS) is important. Supply-side policies are key for long-run growth.
短期增长（利用闲置产能）与长期增长（扩大生产潜力，常表现为 PPF/LRAS 向右移动）的区别很重要。供给侧政策是实现长期增长的关键。
9. Inflation and Unemployment | 通货膨胀与失业
Inflation is a sustained rise in the general price level, measured by CPI or RPI. Causes: demand-pull (too much demand) and cost-push (rising costs). Consequences: reduced purchasing power, menu costs, shoe-leather costs, uncertainty. Deflation is harmful too.
通货膨胀是总体物价水平的持续上升，用 CPI 或 RPI 衡量。原因：需求拉动（需求过多）和成本推动（成本上升）。后果：购买力下降、菜单成本、皮鞋成本、不确定性。通货紧缩同样有害。
Unemployment types: cyclical (demand-deficient), structural, frictional, seasonal. Measurement: claimant count and Labour Force Survey. Costs to individuals (loss of income, skills) and economy (lost output, gov spending). Policies to reduce: demand-side (fiscal/monetary expansion) and supply-side (training, removing barriers).
失业类型：周期性（需求不足）、结构性、摩擦性、季节性。衡量：申请人数和劳动力调查。对个人（收入损失、技能流失）和经济（产出损失、政府支出）的成本。减少失业的政策：需求侧（财政/货币扩张）和供给侧（培训、消除壁垒）。
The Phillips Curve (short-run trade-off) suggests that lowering unemployment may push up inflation, though relationships can shift with expectations and supply-side improvements.
菲利普斯曲线（短期权衡）表明降低失业率可能会推高通胀，尽管这种关系会随预期和供给侧改善而发生变化。
10. Fiscal Policy | 财政政策
Fiscal policy uses government spending and taxation to influence the economy. Expansionary policy (increasing spending or cutting taxes) to boost AD; contractionary to reduce AD. Budget deficit vs surplus. Direct taxes (income tax, corporation tax) vs indirect taxes (VAT, excise duties). Evaluate using automatic stabilisers and the national debt.
财政政策利用政府支出和税收来影响经济。扩张性政策（增加支出或减税）以提振总需求；紧缩性政策以减少总需求。预算赤字与盈余。直接税（所得税、公司税）与间接税（增值税、消费税）。结合自动稳定器和国债进行评估。
The government’s budget position reflects its fiscal stance. A large structural deficit can limit future policy flexibility, while automatic stabilisers (e.g., welfare payments, progressive taxes) work without deliberate intervention.
政府的预算状况反映其财政立场。巨额结构性赤字会限制未来的政策灵活性，而自动稳定器（如福利支出、累进税）则无需刻意干预即可发挥作用。
11. Monetary Policy | 货币政策
Monetary policy involves controlling interest rates, money supply, and exchange rates by the central bank. The Bank of England’s Monetary Policy Committee (MPC) aims to meet the 2% inflation target. Lower interest rates encourage borrowing and spending, increasing AD. Quantitative easing (QE) is used when rates are near zero. Transmission mechanism explained.
货币政策涉及中央银行对利率、货币供应和汇率的控制。英格兰银行货币政策委员会（MPC）旨在实现 2% 的通胀目标。降低利率鼓励借贷和支出，增加总需求。当利率接近零时，会使用量化宽松（QE）。需解释传导机制。
Changes in the base rate affect mortgage payments, savings, and business investment. A tight monetary policy cools an overheating economy but can dampen confidence. The lags in policy mean effects are not instant.
基准利率变动影响房贷还款、储蓄和企业投资。紧缩性货币政策能给过热经济降温，但也可能打击信心。政策存在时滞意味着效果不会立竿见影。
12. International Trade and Globalisation | 国际贸易与全球化
International trade allows countries to specialise based on comparative advantage, leading to higher global output. Free trade has benefits: lower prices, greater choice, economies of scale. Protectionism includes tariffs, quotas, and non-tariff barriers. Exchange rates: appreciation makes exports dearer, imports cheaper; depreciation the opposite. Globalisation increases interdependence, bringing opportunities and challenges.
国际贸易使各国能够基于比较优势进行专业化，从而提高全球产出。自由贸易的好处：更低的价格、更多的选择、规模经济。保护主义包括关税、配额和非关税壁垒。汇率：升值使出口更贵、进口更便宜；贬值则相反。全球化增加了相互依存，带来了机遇与挑战。
The current account of the balance of payments records trade in goods, services, income and transfers. A persistent deficit may reflect a loss of competitiveness. Supply-side measures and exchange rate adjustments can help correct imbalances.
国际收支经常账户记录商品、服务、收入和转移的贸易。持续性逆差可能反映竞争力下降。供给侧措施和汇率调整有助于纠正失衡。
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