📚 Year 11 Edexcel Economics: Core Knowledge Review | Year 11 Edexcel 经济：核心知识点梳理
This article provides a concise yet comprehensive overview of the core topics covered in Year 11 Edexcel Economics. From the fundamental economic problem to international trade and macroeconomic policies, each section highlights key definitions, diagrams, and essential explanations needed for exam success. Whether revising for mocks or final assessments, these concepts form the backbone of the GCSE Economics syllabus.
本文为 Year 11 Edexcel 经济学提供简明扼要的核心知识梳理。从基本经济问题到国际贸易与宏观经济政策，每一节都突出关键定义、图表和考试必备的解释。无论是模拟考还是最终评估，这些概念都是 GCSE 经济学大纲的基石。
1. The Basic Economic Problem and Opportunity Cost | 基本经济问题与机会成本
The basic economic problem arises because resources are scarce while human wants are unlimited. Scarcity forces individuals, firms, and governments to make choices about how to allocate limited resources. The three fundamental economic questions are: What to produce? How to produce? For whom to produce?
基本经济问题源于资源的稀缺性与人类欲望的无限性。稀缺性迫使个人、企业和政府在选择中配置有限资源。三个基本经济问题是：生产什么？如何生产？为谁生产？
Opportunity cost is the value of the next best alternative forgone when a decision is made. Every choice involves a trade-off, and understanding opportunity cost helps explain why resources cannot be used for all desired purposes at the same time.
机会成本是做出决策时所放弃的次优选择的价值。每一个选择都涉及到权衡取舍，理解机会成本有助于解释为何资源无法同时满足所有需求。
2. Demand | 需求
Demand is the quantity of a good or service that consumers are willing and able to buy at a given price over a period of time. The law of demand states there is an inverse relationship between price and quantity demanded — as price rises, quantity demanded falls, ceteris paribus.
需求是指在一定时期内，消费者愿意且能够以某一价格购买的商品或服务的数量。需求定律表明，价格与需求量之间呈反向关系——其他条件不变下，价格上升，需求量下降。
Movements along the demand curve occur only when there is a change in price. A shift of the demand curve happens when a non-price factor changes, such as income, tastes, prices of substitutes or complements, population, or advertising.
只有在价格变动时，需求曲线上的点才会发生移动。当非价格因素（如收入、偏好、替代品或互补品价格、人口或广告）改变时，整条需求曲线将发生平移。
3. Supply | 供给
Supply is the quantity of a good or service that producers are willing and able to sell at a given price over a period of time. The law of supply states there is a direct relationship between price and quantity supplied — as price rises, quantity supplied increases, ceteris paribus.
供给是指在一定时期内，生产者愿意且能够以某一价格出售的商品或服务的数量。供给定律表明，价格与供给量之间呈正向关系——其他条件不变下，价格上升，供给量增加。
A movement along the supply curve is caused by a price change. The supply curve shifts when there is a change in costs of production, technology, indirect taxes or subsidies, number of firms, or expectations about future prices.
价格变动引起供给曲线上的点移动。当生产成本、技术、间接税或补贴、企业数量、对未来价格的预期等发生变化时，供给曲线会发生平移。
4. Market Equilibrium and Price Mechanism | 市场均衡与价格机制
Market equilibrium occurs where the quantity demanded equals the quantity supplied. At the equilibrium price there is no excess demand or excess supply. If the price is above equilibrium, a surplus exists, putting downward pressure on price; if below equilibrium, a shortage pushes the price upward.
市场均衡发生在需求量等于供给量之处。在均衡价格下，没有超额需求或超额供给。若价格高于均衡，存在过剩，价格面临下行压力；若低于均衡，短缺会推动价格上升。
The price mechanism functions through the forces of demand and supply to allocate resources efficiently. It signals to producers what to produce, provides incentives to adjust output, and rations scarce goods to those willing and able to pay.
价格机制通过供求力量有效配置资源。它向生产者传递生产什么的信号，提供调整产出的激励，并将稀缺商品配给给愿意并有能力支付的人。
5. Price Elasticity of Demand (PED) | 需求的价格弹性
Price elasticity of demand measures the responsiveness of quantity demanded to a change in price. It is calculated as:
需求的价格弹性衡量需求量对价格变动的反应程度。计算公式为：
PED = %Δ Quantity Demanded ÷ %Δ Price
venue. Unitary elasticity (PED = 1) means total revenue stays constant when price changes.
若 PED > 1，需求富有弹性，降价会增加总收入。若 PED < 1，需求缺乏弹性，提价会增加总收入。单位弹性 (PED = 1) 意味着价格变动时总收入保持不变。
6. Market Failure | 市场失灵
Market failure occurs when the free market fails to allocate resources efficiently, resulting in a net welfare loss. Common causes include positive and negative externalities, public goods, information asymmetries, and monopoly power.
当自由市场未能有效配置资源，导致净福利损失时，就会发生市场失灵。常见原因包括正负外部性、公共品、信息不对称和垄断力量。
Negative externalities (e.g. pollution) lead to overproduction because firms ignore external costs. Positive externalities (e.g. education) result in underproduction because private benefits are less than social benefits. Public goods are non-excludable and non-rival, causing the free-rider problem.
负外部性（如污染）导致过度生产，因为企业忽略了外部成本。正外部性（如教育）导致生产不足，因为私人收益低于社会收益。公共品具有非排他性和非竞争性，导致搭便车问题。
7. Government Intervention | 政府干预
Governments intervene in markets to correct market failures and improve economic welfare. Methods include indirect taxation on demerit goods, subsidies for merit goods, maximum and minimum price controls, and regulations or bans on harmful activities.
政府干预市场以纠正市场失灵并改善经济福利。方法包括对有害品征收间接税、对有益品提供补贴、实施最高或最低价格管制，以及颁布法规或禁令。
An indirect tax shifts the supply curve to the left, raising the price and reducing the quantity consumed. A subsidy shifts the supply curve to the right, lowering the price and increasing consumption. Price floors (e.g. minimum wage) create surplus, while price ceilings create shortages.
间接税使供给曲线左移，提高价格并减少消费量。补贴使供给曲线右移，降低价格并增加消费。价格下限（如最低工资）产生过剩，价格上限则造成短缺。
8. Macroeconomic Objectives and Measures | 宏观经济目标与衡量指标
The main macroeconomic objectives are: stable economic growth, low and stable inflation, low unemployment, and a satisfactory balance of payments on the current account. Governments may also aim for a more equal distribution of income and environmental sustainability.
宏观经济的主要目标是：稳定的经济增长、低而稳定的通货膨胀、低失业率以及令人满意的经常账户收支平衡。政府还可能追求更公平的收入分配和环境可持续性。
Gross Domestic Product (GDP) measures the total value of output produced in an economy over a period. Real GDP strips out the effects of inflation to provide a truer picture of economic growth. However, GDP has limitations, such as ignoring the informal economy and non-market activities.
国内生产总值（GDP）衡量一个经济体在一段时期内生产的总产出价值。实际 GDP 剔除了通货膨胀的影响，更真实地反映经济增长。但 GDP 存在局限，例如忽略地下经济和非市场活动。
9. Economic Growth | 经济增长
Economic growth is an increase in the productive capacity of an economy, typically measured by the percentage change in real GDP. It can be illustrated by an outward shift of the production possibility curve (PPC) or a rightward shift of the long-run aggregate supply curve.
经济增长是指经济生产能力的提高，通常以实际 GDP 的百分比变化来衡量。它可以用生产可能性曲线（PPC）向外移动或长期总供给曲线右移来表示。
Benefits of growth include higher living standards, increased employment, and greater tax revenue for public services. Costs may include inflation, environmental damage, and depletion of non-renewable resources if growth is not sustainable.
经济增长的好处包括提高生活水平、增加就业和为公共服务带来更多税收。代价可能包括通货膨胀、环境破坏，以及若增长不可持续会导致不可再生资源耗竭。
10. Unemployment | 失业
Unemployment refers to people who are actively seeking work but unable to find a job. The main types are cyclical (demand-deficient), structural (mismatch of skills), frictional (between jobs), and seasonal. The unemployment rate is the percentage of the labour force that is unemployed.
失业是指积极寻找工作但无法找到工作的人。主要类型有周期性（需求不足型）、结构性（技能错配）、摩擦性（工作转换期间）和季节性失业。失业率是劳动力中失业人口所占的百分比。
Consequences of unemployment include lost output, reduced tax revenues, increased government spending on benefits, and social costs such as poverty and crime. Policies to reduce unemployment may include expansionary demand-side measures or supply-side training and education programmes.
失业的后果包括产出损失、税收减少、政府福利支出增加以及贫困与犯罪等社会成本。减少失业的政策可包括扩张性需求端措施或供给侧的教育培训项目。
11. Inflation | 通货膨胀
Inflation is a sustained increase in the general price level, reducing the purchasing power of money. It is commonly measured by the Consumer Price Index (CPI). Demand-pull inflation occurs when aggregate demand grows faster than aggregate supply, while cost-push inflation results from rising production costs.
通货膨胀是总体物价水平的持续上升，削弱了货币的购买力。常用消费者价格指数（CPI）来衡量。需求拉上型通胀是当总需求增长快于总供给时发生，而成本推动型通胀则源于生产成本的上升。
Moderate inflation can encourage spending and investment, but high or unpredictable inflation distorts economic decisions, erodes savings, and harms international competitiveness. Governments use monetary policy to control inflation by adjusting interest rates or the money supply.
温和的通胀可以刺激支出与投资，但高通胀或不可预测的通胀会扭曲经济决策、侵蚀储蓄并损害国际竞争力。政府运用货币政策，通过调整利率或货币供应量来控制通胀。
12. International Trade and Exchange Rates | 国际贸易与汇率
International trade allows countries to specialise in producing goods where they have a comparative advantage, leading to lower prices and greater variety for consumers. Barriers to trade include tariffs, quotas, and non-tariff regulations, which can protect domestic industries but increase prices.
国际贸易使各国能够专门生产具有比较优势的商品，从而为消费者带来更低的价格和更多的选择。贸易壁垒包括关税、配额和非关税法规，它们可保护国内产业但会提高价格。
An exchange rate is the price of one currency in terms of another. A stronger currency (appreciation) makes exports more expensive and imports cheaper, potentially worsening the trade balance. A weaker currency (depreciation) has the opposite effect. Governments may intervene to manage exchange rates or allow them to float freely.
汇率是一种货币以另一种货币表示的价格。货币走强（升值）使出口更贵、进口更便宜，可能使贸易收支恶化。货币走弱（贬值）则产生相反影响。政府可能干预以管理汇率，或允许其自由浮动。
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