📚 Core CIE IGCSE Economics Concepts for Year 10 | 10年级CIE经济学核心知识点梳理
This article summarises the essential concepts covered in Year 10 CIE IGCSE Economics, including scarcity, opportunity cost, demand and supply, market equilibrium, elasticity, market failure, government intervention, macroeconomic indicators, aggregate demand and supply, fiscal and monetary policy, and international trade. Understanding these foundations is crucial for exam success and real-world economic analysis.
本文梳理了10年级CIE IGCSE经济学涵盖的核心概念，包括稀缺性、机会成本、需求与供给、市场均衡、弹性、市场失灵、政府干预、宏观经济指标、总需求与总供给、财政与货币政策以及国际贸易。掌握这些基础对于考试成功和现实经济分析至关重要。
1. Scarcity and Choice | 稀缺性与选择
The basic economic problem is that resources are scarce while human wants are infinite. This means societies cannot produce everything people desire.
基本经济问题是资源稀缺而人类欲望无穷。这意味着社会无法生产人们想要的一切。
The four factors of production are land (natural resources), labour (human effort), capital (man-made goods used in production), and enterprise (the ability to combine the other factors and take risks).
生产要素有四种：土地（自然资源）、劳动（人力）、资本（用于生产的人造物品）和企业（组织其他要素并承担风险的能力）。
2. Opportunity Cost and PPC | 机会成本与生产可能性曲线
Opportunity cost is the value of the next best alternative forgone when a choice is made. Every decision involves a trade-off.
机会成本是做出选择时所放弃的次优选择的代价。每个决策都涉及权衡。
The production possibility curve (PPC) shows the maximum possible output combinations of two goods with given resources and technology. Points on the curve are efficient, inside are inefficient, and outside are unattainable.
生产可能性曲线（PPC）显示了在给定资源和技术下两种商品的最大可能产出组合。曲线上点是有效率的，曲线内点无效率，曲线外点无法实现。
Moving along the PPC illustrates the opportunity cost of producing more of one good. Outward shifts represent economic growth.
沿 PPC 移动说明多生产一种商品的机会成本。曲线向外移动代表经济增长。
3. Demand | 需求
Demand is the quantity of a good that consumers are willing and able to buy at various prices in a given time period. The law of demand states that, ceteris paribus, as price falls, quantity demanded increases, leading to a downward-sloping demand curve.
需求是在特定时期内，消费者在各种价格下愿意并能够购买的商品数量。需求定律指出，其他条件不变时，价格下降，需求量上升，导致需求曲线向下倾斜。
Factors that shift the demand curve (changing demand) include income, tastes, prices of related goods (substitutes and complements), population, and advertising.
导致需求曲线移动（需求变化）的因素包括收入、偏好、相关商品价格（替代品和互补品）、人口和广告。
4. Supply | 供给
Supply is the quantity of a good that producers are willing and able to offer for sale at different prices. The law of supply says that, ceteris paribus, as price rises, quantity supplied increases, giving an upward-sloping supply curve.
供给是生产者在不同价格下愿意并能够出售的商品数量。供给定律指出，其他条件不变时，价格上升，供给量增加，供给曲线向上倾斜。
Supply curve shifts are caused by changes in costs of production, technology, taxes, subsidies, the number of sellers, and expectations.
供给曲线移动的原因包括生产成本、技术、税收、补贴、卖方数量和预期等变化。
5. Market Equilibrium and Price Mechanism | 市场均衡与价格机制
Market equilibrium occurs where quantity demanded equals quantity supplied, determining the equilibrium price and quantity. At prices above equilibrium there is excess supply; below it, excess demand.
市场均衡发生在需求量等于供给量之处，决定了均衡价格和数量。在高于均衡价格时存在超额供给；低于时存在超额需求。
The price mechanism (invisible hand) allocates resources by signalling where products are needed and where they are not. It functions through the price system in a market economy.
价格机制（看不见的手）通过信号显示哪里需要产品、哪里不需要来配置资源。在市场经济中通过价格体系运作。
6. Price Elasticity | 价格弹性
Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price. It is calculated as:
需求的价格弹性（PED）衡量需求量对价格变化的反应程度。计算公式为：
PED = %Δ Qd ÷ %Δ P
D = 1. Determinants include availability of substitutes, necessity vs luxury, time period.
如果 PED > 1，需求富有弹性；如果 PED < 1，缺乏弹性；PED = 1 为单位弹性。决定因素包括替代品的可得性、必需品或奢侈品、时间长短。
Price elasticity of supply (PES) measures the responsiveness of quantity supplied to price changes. It is influenced by the ability to increase production quickly, spare capacity, and storage possibilities.
供给的价格弹性（PES）衡量供给量对价格变化的反应程度。影响因素包括快速增产的能力、闲置产能和储存可能性。
7. Market Failure | 市场失灵
Market failure occurs when the free market fails to allocate resources efficiently. Main causes: externalities (positive and negative), public goods (non-excludable and non-rival), imperfect information, and monopoly power.
市场失灵是指自由市场未能有效配置资源。主要原因包括：外部性（正和负）、公共物品（非排他性和非竞争性）、不完全信息和垄断势力。
Negative externalities, such as pollution, mean that social cost > private cost, leading to overproduction. Positive externalities, like education, mean social benefit > private benefit, causing underproduction.
负外部性如污染，意味着社会成本 > 私人成本，导致过度生产。正外部性如教育，意味着社会收益 > 私人收益，导致生产不足。
Public goods would not be provided by the market because of the free-rider problem.
公共物品由于搭便车问题而无法由市场提供。
8. Government Microeconomic Intervention | 政府微观干预
Governments intervene to correct market failure. Methods include indirect taxation (e.g., carbon tax to internalise externalities), subsidies, price controls (maximum and minimum prices), regulation, and direct provision of goods.
政府干预以纠正市场失灵。方法包括间接税（如碳税使外部性内部化）、补贴、价格控制（最高和最低价格）、监管以及直接提供商品。
A maximum price (ceiling) is set below equilibrium to make goods affordable, but may lead to shortages. A minimum price (floor) is set above equilibrium to support producers, possibly causing surpluses.
最高限价设定在均衡价格以下以使商品可负担，但可能导致短缺。最低限价设定在均衡以上以支持生产者，可能造成过剩。
9. Macroeconomic Objectives and Indicators | 宏观经济目标与指标
Governments aim for: low and stable inflation, low unemployment, economic growth, and a satisfactory balance of payments. Inflation is a sustained increase in the general price level, often measured by the Consumer Price Index (CPI).
政府的目标是：低而稳定的通胀、低失业率、经济增长和满意的国际收支平衡。通货膨胀是总体物价水平的持续上涨，通常用消费物价指数（CPI）衡量。
Unemployment occurs when people willing and able to work cannot find jobs. Common types: cyclical, frictional, structural. Economic growth is an increase in real GDP over time.
失业是指愿意且有能力工作的人找不到工作。常见类型：周期性、摩擦性、结构性。经济增长是实际GDP随时间的增加。
10. Aggregate Demand and Aggregate Supply | 总需求与总供给
consumption, investment, government spending, net exports. The AD curve slopes downwards.
总需求（AD）是经济体中商品和服务的总支出：AD = C + I + G + (X - M)。组成部分：消费、投资、政府支出、净出口。AD曲线向下倾斜。
Aggregate Supply (AS) is the total output producers are willing to supply at different price levels. In the short run, the AS curve is upward sloping. In the long run, the classical LRAS is vertical at full employment output.
总供给（AS）是生产者在不同价格水平愿意提供的总产出。短期总供给曲线向上倾斜。长期，古典 LRAS 在充分就业产出水平垂直。
11. Fiscal and Monetary Policy | 财政与货币政策
Fiscal policy involves government spending and taxation to influence the economy. Expansionary fiscal policy (increased spending or tax cuts) boosts AD; contractionary policy (cuts in spending or tax hikes) reduces AD.
财政政策涉及政府支出和税收以影响经济。扩张性财政政策（增加支出或减税）刺激总需求；紧缩性政策（削减支出或增税）抑制总需求。
Monetary policy, managed by a central bank, controls the money supply and interest rates to achieve macroeconomic objectives. Lower interest rates stimulate borrowing and spending; higher rates do the opposite.
货币政策由中央银行管理，通过控制货币供给和利率来实现宏观经济目标。降低利率刺激借贷和支出；提高利率则相反。
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 greater efficiency and higher world output. Free trade benefits consumers through lower prices and more variety.
国际贸易使各国能够根据比较优势进行专业化，从而提高效率和世界产出。自由贸易通过更低价格和更多选择惠及消费者。
Protectionist measures include tariffs, quotas, and subsidies to domestic producers. These reduce trade and can lead to retaliation. The balance of payments records all transactions between a country and the rest of the world, comprising the current and financial accounts.
贸易保护措施包括关税、配额和对国内生产者的补贴。这些措施会减少贸易并可能招致报复。国际收支记录一国与世界其他国家间的所有交易，包括经常账户和金融账户。
Globalisation refers to increasing integration of economies through trade, investment, and technology. It brings benefits such as greater economic growth but also challenges like job losses in some sectors.
全球化是指通过贸易、投资和技术使经济日益融合。它带来更高的经济增长等好处，但也带来某些行业失业等挑战。
Published by TutorHao | Economics Revision Series | aleveler.com
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