📚 Core Knowledge Summary for Year 10 WJEC Economics | Year 10 WJEC 经济：核心知识点梳理
Welcome to your essential revision guide for Year 10 WJEC Economics. This article breaks down the key concepts you will encounter in the first year of your GCSE course, from the fundamental economic problem to the basics of how markets work and the role of government. Each section is presented in both English and Chinese to support bilingual learning and ensure you grasp the core ideas clearly.
欢迎阅读 Year 10 WJEC 经济学的核心复习指南。本文将拆解你在 GCSE 课程第一年将遇到的关键概念，从基本的经济问题，到市场如何运作以及政府角色的基础知识。每个部分均以中英双语呈现，以支持双语学习，确保你清晰地掌握核心思想。
1. The Basic Economic Problem | 基本经济问题
The basic economic problem arises because wants are unlimited, but the resources available to satisfy them are scarce. This scarcity forces individuals, firms, and governments to make choices.
基本经济问题源于欲望是无限的，但用于满足这些欲望的资源是稀缺的。这种稀缺性迫使个人、企业和政府做出选择。
All economic decisions involve trade-offs. When a choice is made, the next best alternative forgone is called the opportunity cost. Understanding opportunity cost is central to economic thinking.
所有经济决策都涉及权衡取舍。当做出选择时，所放弃的次优替代方案被称为机会成本。理解机会成本是经济思维的核心。
The three fundamental economic questions are: what to produce, how to produce, and for whom to produce. Different economic systems answer these questions in different ways.
三个基本的经济问题是：生产什么、如何生产以及为谁生产。不同的经济体系以不同的方式回答这些问题。
2. Factors of Production | 生产要素
Resources used to produce goods and services are called factors of production. There are four main categories: land, labour, capital, and enterprise.
用于生产商品和服务的资源被称为生产要素。有四大类别：土地、劳动、资本和企业家才能。
Land refers to all natural resources, including raw materials, minerals, and the physical space used in production. The reward for land is rent.
土地指所有自然资源，包括原材料、矿物以及用于生产的物理空间。土地的报酬是地租。
Labour is the human effort, both physical and mental, used in production. The reward for labour is wages.
劳动是生产中投入的人类努力，包括体力和脑力。劳动的报酬是工资。
Capital consists of man-made goods used to produce other goods and services, such as machinery and factories. The reward for capital is interest.
资本指用于生产其他商品和服务的人造物品，如机器和工厂。资本的报酬是利息。
Enterprise is the ability to bring the other factors together, take risks, and innovate. The reward for enterprise is profit.
企业家才能是将其他要素组织起来、承担风险并创新的能力。其报酬是利润。
| Factor | Explanation | Reward |
|---|---|---|
| Land | Natural resources | Rent |
| Labour | Human effort | Wages |
| Capital | Man-made tools | Interest |
| Enterprise | Risk-taking, innovation | Profit |
3. Opportunity Cost and Production Possibility Frontiers | 机会成本与生产可能性边界
Opportunity cost is the value of the next best alternative sacrificed when a choice is made. It applies not only to money spent, but also to time and resources used.
机会成本是做出选择时所牺牲的次优替代方案的价值。它不仅适用于花费的金钱，也适用于所用的时间和资源。
A Production Possibility Frontier (PPF) shows the maximum combinations of two goods that an economy can produce when all resources are fully and efficiently used. Points on the curve represent efficiency; points inside show underutilisation.
生产可能性边界（PPF）展示了一个经济体在所有资源得到充分且有效利用时，所能生产的两种商品的最大组合。曲线上的点代表效率；曲线内的点代表资源未充分利用。
The slope of the PPF illustrates opportunity cost. If the PPF is curved outward, opportunity cost increases as more of one good is produced, due to the law of increasing opportunity cost.
PPF 的斜率说明了机会成本。如果 PPF 向外弯曲，随着一种商品产量增加，机会成本递增，这符合机会成本递增规律。
Economic growth shifts the PPF outward, allowing more of both goods to be produced. This can result from an increase in the quantity or quality of resources, or technological progress.
经济增长使 PPF 向外移动，从而使两种商品的产量都能增加。这可能是由于资源数量或质量的提高，或技术进步。
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 various prices over a period of time. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises.
需求是消费者在一段时间内，在不同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，在其他条件不变的情况下，价格下降，需求量上升。
Movements along the demand curve are caused by a change in price. Shifts of the demand curve are caused by non-price factors such as income, tastes, prices of substitutes and complements, advertising, and population changes.
沿需求曲线的移动是由价格变化引起的。需求曲线的移动是由非价格因素引起的，如收入、偏好、替代品和互补品的价格、广告以及人口变化。
Supply is the quantity of a good or service that producers are willing and able to offer for sale at various prices. The law of supply states that, ceteris paribus, as price rises, quantity supplied rises.
供给是生产者在一段时间内，在不同价格水平下愿意并且能够提供出售的商品或服务的数量。供给定律指出，在其他条件不变的情况下，价格上升，供给量上升。
Shifts in supply can be caused by changes in costs of production, technology, indirect taxes, subsidies, weather conditions (for agricultural products), and the number of sellers.
供给的移动可能由生产成本变化、技术、间接税、补贴、天气条件（对农产品）以及卖方数量等因素引起。
5. Market Equilibrium and Disequilibrium | 市场均衡与非均衡
Market equilibrium occurs where quantity demanded equals quantity supplied. On a diagram, this is where the demand and supply curves intersect. The equilibrium price clears the market.
市场均衡出现在需求量等于供给量的时候。在图形上，这是需求曲线与供给曲线相交之处。均衡价格使市场出清。
If price is set above equilibrium, there is excess supply (a surplus). Producers will reduce price to clear unsold stock, moving the market back to equilibrium.
如果价格设定在均衡价格之上，会出现超额供给（过剩）。生产者会降低价格以清空未售出库存，使市场回归均衡。
If price is below equilibrium, excess demand (a shortage) occurs. Consumers bid up the price, and the market moves toward equilibrium again.
如果价格低于均衡价格，会出现超额需求（短缺）。消费者会抬高价格，市场再次趋向均衡。
Changes in demand or supply shift the curves and create a new equilibrium price and quantity. For example, an increase in demand raises both price and quantity, while an increase in supply lowers price and raises quantity.
需求或供给的变化会使曲线移动，并产生新的均衡价格与数量。例如，需求增加会使价格和数量都上升，而供给增加会使价格下降、数量上升。
6. 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. The basic formula is:
PED = (% change in quantity demanded) ÷ (% change in price)
需求的价格弹性衡量需求量对价格变化的反应程度。基本公式为：
PED = (需求量变动百分比) ÷ (价格变动百分比)
If PED | 1, demand is elastic: a price change leads to a larger percentage change in quantity demanded. If PED < 1, demand is inelastic: quantity demanded changes proportionally less than price.
如果 PED > 1，需求富有弹性：价格变化导致需求量更大幅度的百分比变化。如果 PED < 1，需求缺乏弹性：需求量的变化比例小于价格变化比例。
Factors affecting PED include the availability of substitutes, the degree of necessity, the proportion of income spent on the good, and time. Knowledge of PED helps firms decide on pricing strategies and governments predict tax revenues.
影响需求价格弹性的因素包括替代品的可获得性、必需程度、商品支出占收入的比例以及时间。了解 PED 有助于企业制定定价策略，也有助于政府预测税收收入。
= 0), while a horizontal demand curve represents perfectly elastic demand (PED = ∞).
垂直的需求曲线代表完全无弹性需求（PED = 0），而水平的需求曲线代表完全有弹性需求（PED = ∞）。
7. Price Elasticity of Supply (PES) | 供给的价格弹性
Price elasticity of supply measures how responsive quantity supplied is to a change in price. The formula is:
PES = (% change in quantity supplied) ÷ (% change in price)
供给的价格弹性衡量供给量对价格变化的反应程度。公式为：
PES = (供给量变动百分比) ÷ (价格变动百分比)
Supply tends to be more elastic in the long run because firms have time to adjust production capacity. In the short run, supply is often inelastic due to fixed factors.
长期中供给通常更富有弹性，因为企业有时间调整生产能力。短期内，由于存在固定要素，供给往往缺乏弹性。
Factors affecting PES include the level of spare capacity, the ability to store stock, the time period, and the availability of raw materials. Agricultural products often have inelastic supply in the short run.
影响供给价格弹性的因素包括闲置产能水平、储存库存的能力、时间周期以及原材料的可获得性。农产品在短期内的供给通常缺乏弹性。
8. Market Failure | 市场失灵
Market failure occurs when the price mechanism fails to allocate resources efficiently, leading to a net welfare loss. There are several types of market failure relevant to the Year 10 course.
市场失灵指的是价格机制未能有效配置资源，导致净福利损失的情况。对于 Year 10 课程，有几种相关的市场失灵类型。
Externalities are costs or benefits that affect third parties not involved in the transaction. Negative externalities (e.g. pollution) lead to overproduction, while positive externalities (e.g. education) lead to underproduction.
外部性是指影响未参与交易的第三方的成本或收益。负外部性（如污染）导致过度生产，而正外部性（如教育）导致生产不足。
Public goods are non-excludable and non-rivalrous, meaning people cannot be stopped from using them and one person's use does not reduce availability for others. The free-rider problem means these goods would not be provided by the free market, requiring government intervention.
公共物品具有非排他性和非竞争性，即无法阻止人们使用它们，且一个人的使用不会减少他人的可用性。搭便车问题意味着自由市场不会提供这些物品，需要政府干预。
Information failure occurs when consumers or producers lack full information to make rational decisions. This can lead to unhealthy consumption (demerit goods) or under-consumption of beneficial goods (merit goods).
信息失灵发生在消费者或生产者缺乏充分信息来做出理性决策时。这可能导致不健康消费（有害品）或有益商品（优值品）消费不足。
9. Government Intervention to Correct Market Failure | 政府干预纠正市场失灵
Governments can use indirect taxation to reduce negative externalities. A tax on a demerit good such as cigarettes increases production costs, shifting supply left, raising price, and lowering quantity consumed.
政府可以使用间接税来减少负外部性。对香烟等有害品征税会增加生产成本，使供给曲线左移，提高价格并减少消费量。
Subsidies are payments to producers that lower costs and encourage output of merit goods or those with positive externalities, such as renewable energy or education. A subsidy shifts the supply curve to the right, lowering price and increasing quantity.
补贴是支付给生产者以降低成本、鼓励生产优值品或具有正外部性的产品（如可再生能源或教育）的款项。补贴使供给曲线右移，降低价格并增加数量。
Regulation can set limits on harmful activities. For example, emission caps on factories directly reduce pollution. Governments can also ban certain products outright, such as dangerous chemicals.
法规可以对有害活动设定限制。例如，对工厂的排放上限直接减少污染。政府也可以彻底禁止某些产品，如危险化学品。
Information provision, such as public health campaigns, helps correct information failure. This shifts demand for merit goods to the right or demand for demerit goods to the left.
信息提供，如公共卫生运动，有助于纠正信息失灵。这会使优值品的需求右移，或有害品的需求左移。
Government direct provision of public goods, such as street lighting and national defence, is necessary because the free market would not supply them in sufficient quantities.
政府直接提供公共物品，如路灯和国防，是必要的，因为自由市场不会以足够数量提供这些。
10. Introduction to Macroeconomic Objectives | 宏观经济目标入门
Macroeconomics studies the economy as a whole. The UK government sets key macroeconomic objectives: stable economic growth, low unemployment, low and stable inflation, and a satisfactory balance of payments.
宏观经济学研究整个经济。英国政府设定了关键的宏观经济目标：稳定的经济增长、低失业率、低且稳定的通货膨胀以及令人满意的国际收支平衡。
Economic growth is measured by the percentage change in real Gross Domestic Product (GDP). Real GDP adjusts for inflation, showing an increase in the volume of goods and services produced.
经济增长以实际国内生产总值（GDP）的百分比变化来衡量。实际 GDP 已剔除通胀影响，显示生产的商品和服务数量的增加。
Unemployment is measured by the claimant count or the Labour Force Survey. Types of unemployment include cyclical, structural, and frictional. High unemployment represents wasted resources and reduces living standards.
失业通过申领人数或劳动力调查来衡量。失业类型包括周期性失业、结构性失业和摩擦性失业。高失业代表资源浪费并降低生活水平。
Inflation is a sustained increase in the general price level, measured by the Consumer Price Index (CPI). The UK government's target is 2% CPI inflation. High inflation erodes purchasing power and savings.
通货膨胀是总体价格水平的持续上升，以消费者价格指数（CPI）衡量。英国政府的目标是 2% 的 CPI 通胀。高通胀侵蚀购买力和储蓄。
11. International Trade and the Balance of Payments | 国际贸易与国际收支
International trade allows countries to specialise in producing goods where they have a comparative advantage, then exchange to obtain other goods. This increases total output and living standards globally.
国际贸易使各国能够专门生产其具有比较优势的商品，然后通过交换获得其他商品。这提高了全球总产量和生活水平。
The balance of payments records all financial transactions between a country and the rest of the world. The current account includes trade in goods, trade in services, income flows, and current transfers.
国际收支记录了一国与世界其他地区之间的所有金融交易。经常账户包括货物贸易、服务贸易、收入流动和经常转移。
A current account deficit means the value of imports exceeds exports. While a deficit is not always harmful, a large and persistent deficit can indicate a loss of international competitiveness and lead to foreign debt.
经常账户赤字意味着进口价值超过出口。赤字并不总是有害的，但庞大且持续的赤字可能表明国际竞争力下降，并导致外债。
Exchange rates are the price of one currency in terms of another. A depreciation in the pound makes UK exports cheaper and imports more expensive, which can help reduce a current account deficit.
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，这有助于减少经常账户赤字。
12. Fiscal and Monetary Policy Overview | 财政与货币政策概览
Fiscal policy involves government decisions on taxation and spending. Contractionary fiscal policy (raising taxes or cutting spending) can reduce aggregate demand and control inflation, while expansionary policy boosts growth.
财政政策涉及政府关于税收和支出的决策。紧缩性财政政策（增税或削减支出）可以减少总需求并控制通胀，而扩张性政策促进增长。
Monetary policy in the UK is operated by the Bank of England, mainly through setting the base interest rate. Lowering rates encourages borrowing and spending; raising rates cools an overheating economy and targets inflation.
英国的货币政策由英格兰银行执行，主要通过设定基准利率。降低利率鼓励借贷和支出；提高利率则给过热的经济降温并瞄准通胀目标。
Quantitative easing is an unconventional monetary policy tool where the central bank buys financial assets to inject money into the economy, aiming to lower long-term interest rates and stimulate spending when short-term rates are near zero.
量化宽松是一种非常规货币政策工具，中央银行购买金融资产以向经济注入资金，旨在短期利率接近零时降低长期利率并刺激支出。
Supply-side policies aim to increase the productive capacity of the economy by improving the efficiency of labour, capital, and product markets. Examples include education investment, lower business taxes, and deregulation.
供给方政策旨在通过提高劳动力、资本和产品市场的效率来增强经济的生产能力。例子包括教育投资、降低企业税和放松管制。
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