📚 GCSE Edexcel Economics: End-of-Term Revision Guide | GCSE Edexcel 经济：期末复习提纲
This guide covers the essential topics for the Edexcel GCSE Economics course, organised into clear sections to help you focus your revision. Each concept is explained first in English and then in Chinese, with key definitions, diagrams, and exam-style points highlighted.
本复习提纲覆盖 Edexcel GCSE 经济学课程的关键主题，按照清晰的章节编排，帮助你集中复习。每个概念先用英文解释，再用中文说明，并突出关键定义、图示及考试型要点。
1. The Basic Economic Problem | 基本经济问题
The fundamental economic problem arises because resources are limited (scarce) but human wants are unlimited. This forces individuals, firms and governments to make choices about how to allocate resources.
基本经济问题源于资源有限（稀缺）而人类的欲望无限。这迫使个人、企业和政府必须就如何配置资源做出选择。
Scarcity means we cannot have everything we want. Because of scarcity, we face opportunity cost – the next best alternative given up when a choice is made.
稀缺意味着我们无法拥有想要的一切。由于稀缺，我们面临机会成本——即为做出选择而放弃的次优替代品。
The three key economic questions every society must answer are: What to produce? How to produce? For whom to produce?
每个社会都必须回答三个关键经济问题：生产什么？如何生产？为谁生产？
- Economic agents: households, firms and the government – each make decisions to maximise their objectives (utility, profit, social welfare).
- 经济主体：家庭、企业和政府——各自做出决策以实现其目标（效用最大化、利润最大化、社会福利最大化）。
- Factors of production: land, labour, capital and enterprise – the inputs used to produce goods and services.
- 生产要素：土地、劳动、资本和企业家才能——用于生产商品和服务的投入。
2. Demand and Supply | 需求与供给
Demand is the quantity of a good or service consumers are willing and able to buy at a given price over a period of time. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises.
需求是指在一定时期内，消费者愿意并且能够以某一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，价格下降，需求量上升。
The demand curve slopes downwards from left to right. A movement along the curve occurs when price changes; a shift of the curve occurs when a non‑price factor changes (income, tastes, prices of substitutes/complements, advertising, population).
需求曲线从左向右向下倾斜。价格变动导致沿曲线移动；非价格因素变动导致曲线移动（收入、偏好、替代品/互补品价格、广告、人口）。
Supply is the quantity producers are willing and able to offer for sale at a given price. The law of supply states that as price rises, quantity supplied increases – the supply curve slopes upward.
供给是生产者愿意并且能够以某一价格出售的数量。供给定律指出价格上升，供给量增加——供给曲线向上倾斜。
Factors shifting supply include: costs of production, technology, indirect taxes, subsidies, weather, and number of sellers. A shift to the right means more is supplied at each price.
导致供给曲线移动的因素包括：生产成本、技术、间接税、补贴、天气和卖者的数量。曲线右移表示在每个价格下供给量增加。
Equilibrium price is where demand equals supply. If price is above equilibrium, there is excess supply (surplus); if below, excess demand (shortage). Market forces push price towards equilibrium.
均衡价格是需求等于供给时的价格。价格高于均衡，存在超额供给（过剩）；低于均衡，存在超额需求（短缺）。市场力量将价格推向均衡。
3. Elasticity | 弹性
emand (PED) measures the responsiveness of quantity demanded to a change in price: PED = (%Δ Qd) ÷ (%Δ P).
需求价格弹性 (PED) 衡量需求量对价格变化的反应程度：PED = (%Δ Qd) ÷ (%Δ P)。
f PED < 1, demand is inelastic (necessities, addictive goods). PED = 1 is unitary elastic.
如果 PED > 1，需求富有弹性（奢侈品，替代品多）。如果 PED < 1，需求缺乏弹性（必需品，成瘾性商品）。PED = 1 为单位弹性。
asticity of supply (PES) measures how quantity supplied responds to price changes. PES = (%Δ Qs) ÷ (% In the short run, supply is often inelastic because it takes time to increase production.
供给价格弹性 (PES) 衡量供给量对价格变化的反应。PES = (%Δ Qs) ÷ (%Δ P)。短期中供给常缺乏弹性，因为增加产量需要时间。
Income elasticity of demand (YED): YED = (%Δ Qd) ÷ (% rmal goods have positive YED; inferior goods have negative YED. Luxury goods have YED > 1.
需求收入弹性 (YED)：YED = (%Δ Qd) ÷ (%Δ 收入)。正常品 YED 为正；低档品 YED 为负。奢侈品 YED > 1。
4. Market Failure and Government Intervention | 市场失灵与政府干预
Market failure occurs when the free market fails to allocate resources efficiently. Main causes: externalities, public goods, information gaps, and market power (monopoly).
市场失灵是指自由市场未能有效配置资源。主要原因：外部性、公共物品、信息不对称和市场势力（垄断）。
Positive externalities (e.g. education, healthcare) give spillover benefits to third parties, leading to under‑consumption. Negative externalities (e.g. pollution) impose spillover costs, causing over‑consumption or over‑production.
正外部性（如教育、医疗）给第三方带来溢出收益，导致消费不足。负外部性（如污染）带来溢出成本，导致过度消费或过度生产。
Public goods are non‑excludable and non‑rival (e.g. street lighting, national defence). The free‑rider problem means private firms won't supply them, so governments must provide them.
公共物品具有非排他性和非竞争性（如路灯、国防）。搭便车问题意味着私人企业不会提供，因此必须由政府提供。
Governments intervene through: indirect taxation (to internalise negative externalities), subsidies (for positive externalities), regulation (e.g. pollution permits), and direct provision of public goods.
政府通过以下方式干预：间接税（使负外部性内部化）、补贴（鼓励正外部性）、监管（如排污许可证）和直接提供公共物品。
5. Macroeconomic Objectives | 宏观经济目标
Governments generally pursue four main macroeconomic objectives: sustainable economic growth, low and stable inflation, low unemployment, and a balanced current account on the balance of payments.
政府通常追求四个主要宏观经济目标：可持续经济增长、低而稳定的通货膨胀、低失业率，以及国际收支平衡的经常账户平衡。
Additional objectives may include: reducing income inequality, improving environmental sustainability, and fiscal balance. Trade‑offs can exist between objectives, e.g. reducing unemployment may cause inflation.
其他目标可能包括：减少收入不平等、提高环境可持续性和财政平衡。目标之间可能存在权衡，例如降低失业率可能导致通货膨胀。
Economic growth is measured by the percentage change in real GDP (Gross Domestic Product). Real GDP strips out the effect of inflation to show true output growth.
经济增长通过实际 GDP（国内生产总值）的百分比变化衡量。实际 GDP 剔除了通货膨胀的影响，以显示真实的产出增长。
6. Inflation and Its Measurement | 通货膨胀及其衡量
Inflation is a sustained rise in the general price level. In the UK it is measured by the Consumer Prices Index (CPI) and the Retail Prices Index (RPI). The CPI is used for the Bank of England's 2% target.
通货膨胀是整体物价水平的持续上升。英国通过消费者价格指数 (CPI) 和零售价格指数 (RPI) 来衡量。CPI 用于英格兰银行 2% 的通胀目标。
Demand‑pull inflation occurs when aggregate demand grows faster than aggregate supply. Cost‑push inflation is caused by rising costs of production (e.g. wages, raw materials, energy).
需求拉动型通货膨胀发生在总需求增长快于总供给时。成本推动型通货膨胀由生产成本上升引起（如工资、原材料、能源）。
Consequences of high inflation include: reduced purchasing power, menu costs, shoe‑leather costs, uncertainty for businesses, and potential loss of international competitiveness.
高通胀的后果包括：购买力下降、菜单成本、皮鞋成本、企业不确定性以及可能丧失国际竞争力。
7. Unemployment | 失业
Unemployment refers to people who are willing and able to work but cannot find a job. The headline measure is the LFS (Labour Force Survey) rate based on ILO definitions.
失业是指愿意并且能够工作但找不到工作的人。主要衡量指标是基于国际劳工组织定义的劳动力调查 (LFS) 失业率。
Types of unemployment: cyclical (demand‑deficient) – caused by a downturn in the business cycle; structural – mismatch of skills/geography; frictional – time between jobs; seasonal – linked to time of year.
失业类型：周期性（需求不足型）——由经济周期下行引起；结构性——技能/地域不匹配；摩擦性——转换工作期间的失业；季节性——与一年中的时期相关。
Costs of unemployment include: lost output, lower tax revenue, increased government spending on benefits, personal hardship, and social problems.
失业的代价包括：产出损失、税收减少、政府福利支出增加、个人困难以及社会问题。
8. Fiscal and Monetary Policy | 财政与货币政策
Fiscal policy involves changes in government spending and taxation to influence the economy. Expansionary fiscal policy (higher G, lower T) boosts AD; contractionary fiscal policy (lower G, higher T) reduces AD.
财政政策通过改变政府支出和税收来影响经济。扩张性财政政策（增加 G，减少 T）刺激总需求；紧缩性财政政策（减少 G，增加 T）抑制总需求。
nue − government spending. A deficit occurs when spending exceeds revenue; a surplus when revenue exceeds spending. National debt is the accumulation of past deficits.
政府预算平衡 = 税收收入 − 政府支出。当支出超过收入时出现赤字；当收入超过支出时出现盈余。国债是过去赤字的累积。
Monetary policy is used by the central bank (Bank of England) to control the money supply and interest rates. Lower interest rates encourage borrowing and spending; higher rates curb inflation.
货币政策由中央银行（英格兰银行）用于控制货币供应量和利率。降低利率鼓励借贷和支出；提高利率抑制通货膨胀。
Quantitative easing (QE) is an unconventional monetary tool where the central bank creates new money to buy government bonds, increasing money supply and stimulating the economy.
量化宽松 (QE) 是一种非常规货币政策工具，中央银行创造新货币购买政府债券，增加货币供应量并刺激经济。
9. International Trade and Globalisation | 国际贸易与全球化
International trade allows countries to specialise and benefit from comparative advantage, leading to higher world output and lower prices. Globalisation is the growing integration of economies worldwide.
国际贸易使各国能够专业化并从比较优势中获益，从而提高全球产量并降低价格。全球化是世界各国经济日益融合的过程。
Benefits of free trade: greater choice for consumers, economies of scale for firms, and transfer of technology. Drawbacks: job losses in declining industries, trade deficits, and cultural erosion.
自由贸易的好处：消费者有更多选择、企业可实现规模经济、技术转移。弊端：衰退产业的工作岗位流失、贸易逆差和文化侵蚀。
Protectionist measures include: tariffs (taxes on imports), quotas (limits on quantity), subsidies to domestic producers, and non‑tariff barriers (regulations). They protect domestic jobs but raise prices and risk retaliation.
保护主义措施包括：关税（对进口征税）、配额（数量限制）、对国内生产者的补贴以及非关税壁垒（法规）。它们保护国内就业，但提高价格并可能招致报复。
10. Exchange Rates | 汇率
An exchange rate is the price of one currency in terms of another. It is determined by supply and demand on the foreign exchange market (floating system) or set by the government (fixed system).
汇率是一种货币以另一种货币表示的价格。它由外汇市场的供求决定（浮动汇率制），或由政府设定（固定汇率制）。
A depreciation (fall in value) makes exports cheaper and imports more expensive; an appreciation (rise in value) makes exports dearer and imports cheaper. This affects the trade balance.
贬值（价值下跌）使出口更便宜，进口更昂贵；升值（价值上升）使出口更贵，进口更便宜。这影响贸易平衡。
Factors influencing exchange rates: interest rates (higher rates attract hot money, causing appreciation), inflation, economic growth, speculation, and central bank intervention.
影响汇率的因素：利率（较高利率吸引热钱，导致升值）、通货膨胀、经济增长、投机和央行干预。
11. Economic Development and Inequality | 经济发展与不平等
Economic development goes beyond GDP growth to include improvements in living standards, health, education, and environmental quality. The Human Development Index (HDI) combines life expectancy, education and income.
经济发展不仅包括 GDP 增长，还包括生活水平、健康、教育和环境质量的改善。人类发展指数 (HDI) 结合了预期寿命、教育和收入三方面。
uality). Causes include differences in skills, education, inheritance, and discrimination.
收入不平等可通过基尼系数衡量（0 = 完全平等，1 = 完全不平等）。原因包括技能差异、教育、继承和歧视。
Governments can reduce inequality through progressive taxation, cash transfers, minimum wage legislation, and investment in public services like education and healthcare.
政府可以通过累进税制、现金转移支付、最低工资立法以及对教育和医疗等公共服务的投资来减少不平等。
12. Exam Technique and Key Diagrams | 考试技巧与关键图表
For high marks, always define key terms, apply them to the context, and support your analysis with clear, well‑labelled diagrams. In Edexcel GCSE Economics, diagrams are often used to illustrate demand/supply shifts, externalities, and the business cycle.
要取得高分，始终定义关键术语，将其应用于情境中，并用清晰、标注正确的图表支持你的分析。在 Edexcel GCSE 经济学中，图表常被用于说明需求/供给移动、外部性和经济周期。
Use the 'DIAM' structure for longer questions: Define key terms; Identify causes/consequences; Analyse with diagram or chain of reasoning; Make a justified judgment.
回答较长的题目时使用 'DIAM' 结构：定义关键术语；识别原因/后果；用图表或推理链进行分析；做出有依据的判断。
Common diagram types to practise: market supply and demand, external cost/benefit diagrams, PPC (Production Possibility Curve), AD/AS (though simple AS is not heavily tested at GCSE, shifts in AD are used), and the trade‑off between macroeconomic objectives.
需练习的常见图表类型：市场供求图、外部成本/收益图、生产可能性曲线 (PPC)、总需求/总供给图（虽然简单的 AS 在 GCSE 中考查不多，但 AD 的移动会用到）以及宏观经济目标之间的权衡图。
Remember to consider both short‑run and long‑run consequences when evaluating, and refer back to the extract or case study provided in the exam paper.
评估时要同时考虑短期和长期后果，并回顾试卷提供的摘录或案例研究。
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