IGCSE Economics: Overview of Microeconomic Decision Makers | IGCSE经济：微观经济决策者概览

📚 IGCSE Economics: Overview of Microeconomic Decision Makers | IGCSE经济：微观经济决策者概览

Microeconomics is the study of the behaviour of individual economic units. In the CIE IGCSE Economics syllabus, the key microeconomic decision makers are consumers, workers, producers and the government.

微观经济学研究单个经济主体的行为。在CIE IGCSE经济课程大纲中，关键的微观经济决策者是消费者、工人、生产者和政府。

Each of these groups must respond to the fundamental economic problem of scarcity: wants are unlimited, but resources are limited. Every choice they make therefore involves an opportunity cost.

这些群体都必须应对稀缺这一基本经济问题：欲望无限，但资源有限。因此他们做出的每一个选择都涉及机会成本。

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1. What Are Microeconomic Decision Makers? | 什么是微观经济决策者？

Microeconomic decision makers are the individual agents who allocate scarce resources in an economy. They interact in markets to determine prices, quantities, wages and output.

微观经济决策者是在经济中配置稀缺资源的单个主体。他们在市场中相互作用，从而决定价格、数量、工资和产出。

Consumers demand goods and services, workers supply labour, producers supply goods and hire workers, and the government sets rules and provides certain goods and services.

消费者需求商品和服务，工人供给劳动力，生产者供给商品并雇佣工人，政府则制定规则并提供某些商品和服务。

All decision makers must constantly compare the benefits of a choice with its costs, especially the next best alternative forgone — that is, the opportunity cost.

所有决策者都必须不断将一项选择的收益与其成本进行比较，尤其是所放弃的次优选择，即机会成本。

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2. Consumers: Roles and Objectives | 消费者：角色与目标

Consumers are individuals or households who purchase goods and services to satisfy needs and wants. Their main economic objective is to maximise utility, which means getting the highest possible satisfaction from the income they earn.

消费者是购买商品和服务以满足需要和欲望的个人或家庭。他们的主要经济目标是效用最大化，即从收入中获得尽可能高的满足感。

In making choices, consumers compare the satisfaction gained from each additional unit of a good with the price they must pay. The law of diminishing marginal utility explains why demand curves usually slope downwards.

在做出选择时，消费者会比较每多消费一单位商品所获得的满足感与必须支付的价格。边际效用递减规律解释了为什么需求曲线通常向下倾斜。

Important influences on consumer decisions include:

影响消费者决策的重要因素包括：

• Price of the good: a fall in price makes the good more attractive compared with substitutes.

  商品价格：价格下降使该商品相对于替代品更具吸引力。

• Consumer income: an increase in income normally raises demand for normal goods and lowers demand for inferior goods.

  消费者收入：收入增加通常会提高对正常商品的需求，降低对低档商品的需求。

• Tastes and preferences: advertising, fashion and habit can shift demand.

  偏好：广告、时尚和习惯都会使需求发生变动。

• Expectations of future prices: if consumers expect prices to rise, they may buy more now.

  对未来价格的预期：如果消费者预期价格将上涨，他们可能会现在购买更多。

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3. Consumers: Spending and Saving | 消费者：支出与储蓄

Consumers allocate their income between current expenditure and saving for future use. Saving involves a trade-off: it postpones consumption, but in return it earns interest and allows larger future purchases.

消费者将收入分配于当前支出和为未来使用而储蓄。储蓄涉及一种取舍：它推迟消费，但作为回报能赚取利息，并允许未来进行更大规模购买。

The simplest budget identity for a consumer can be written as:

Income = Consumption + Saving

If interest rates rise, the reward for saving increases, so households may choose to save more and spend less, although the actual response depends on income levels and preferences.

如果利率上升，储蓄的回报增加，因此家庭可能选择多储蓄、少消费，但实际反应取决于收入水平和偏好。

Consumers also act as the ultimate buyers of goods and services, so their spending patterns tell producers what to make and how much to produce.

消费者还充当商品和服务的最终购买者，因此他们的支出模式告诉生产者生产什么以及生产多少。

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4. Workers: Roles and Objectives | 工人：角色与目标

Workers supply their labour in exchange for wages, salaries and other benefits. Their economic objective is to maximise their wellbeing, which includes both monetary reward and non-monetary advantages such as safe working conditions, job security, holidays and flexible hours.

工人通过提供劳动力来换取工资、薪金和其他福利。他们的经济目标是最大化自身福利，既包括金钱报酬，也包括安全的工作条件、工作保障、假期和弹性工时等非金钱优势。

Every worker must choose between working extra hours and enjoying leisure. The opportunity cost of an extra hour of work is the value of the leisure time that is given up.

每个工人必须在增加工作时间和享受闲暇之间做出选择。多工作一小时的机会成本就是所放弃的闲暇时间的价值。

Generally, the supply of labour rises when the wage offered increases, because more people are willing to work, and existing workers may be prepared to work longer hours.

通常，当提供的工资增加时，劳动力供给会增加，因为更多原意工作的人会出现，现有工人也可能愿意延长工作时间。

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5. Workers: Wage Determination and Trade Unions | 工人：工资决定与工会

Wages are determined in markets by the interaction of the demand for labour and the supply of labour. The demand for workers is a derived demand: firms hire workers because they produce goods and services of value.

工资由劳动力需求与劳动力供给在市场中相互作用而决定。对工人的需求是派生需求：企业雇佣工人，是因为他们能生产有价值的商品和服务。

Workers who are more productive, skilled or experienced tend to be in higher demand and can negotiate higher wages. Education and training, known as human capital, therefore raise a worker’s earning potential.

生产率更高、技能更强或经验更丰富的工人往往需求更大，并能协商更高的工资。教育和工作培训，即人力资本，因此能提高工人的收入潜力。

Trade unions help workers bargain collectively with employers for higher wages, better working conditions and greater job security. If unions force wages above the market equilibrium level, however, they may reduce the number of workers that firms are willing to hire.

工会帮助工人与雇主进行集体谈判，以争取更高工资、更好工作条件和更强工作保障。然而，如果工会迫使工资高于市场均衡水平，可能会减少企业愿意雇佣的工人数量。

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6. Producers: Types and Objectives | 生产者：类型与目标

Producers are individuals or organisations that create goods and services to sell. They may be sole proprietors, partnerships, private limited companies, public limited companies or even government-owned enterprises.

生产者是制造并销售商品和服务的个人或组织。可以是个体经营者、合伙企业、私营有限公司、公营有限公司，甚至是政府所有企业。

The most widely recognised objective of a firm is profit maximisation. Profit is the surplus of total revenue over total cost:

企业最广泛认可的目标是利润最大化。利润是总收益减去总成本后的剩余：

Profit = Total Revenue − Total Cost

However, producers may also pursue other goals, such as increasing market share, ensuring survival in tough times, providing high-quality products, or meeting corporate social responsibility targets.

但生产者也可能追求其他目标，例如增加市场份额、在困难时期确保生存、提供高质量产品，或履行企业社会责任目标。

Producers are also decision makers about how to combine limited factors of production — land, labour, capital and enterprise — to produce efficiently.

生产者还是如何组合有限生产要素——土地、劳动、资本和企业家才能——以实现高效生产的决策者。

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7. Producers: Costs, Revenues and Output Decisions | 生产者：成本、收益与产量决策

To decide how much to produce, firms compare the additional revenue from selling one more unit with the additional cost of producing it. Fixed costs remain unchanged when output changes, while variable costs rise as more is produced.

为了决定产量，企业会比较每多销售一单位所获得的额外收益与每多生产一单位所产生的额外成本。固定成本不随产量变动，而可变成本随着产量增加而增加。

The relationship can be summarised as below:

Total Cost = Fixed Cost + Variable Cost

Total Revenue = Price × Quantity Sold

A firm compares these totals to assess whether it is making a profit or a loss. If the price received for a good is greater than its average cost, the firm earns a normal or supernormal profit.

企业通过比较这些总量来判断自己是盈利还是亏损。如果商品的价格高于平均成本，企业就能赚取正常利润或超额利润。

In competitive markets, producers must keep costs low, adopt efficient methods and respond quickly to consumer demand in order to survive.

在竞争性市场中，生产者必须降低成本、采用高效方法并迅速对消费者需求做出反应，以求得生存。

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8. Government: Roles and Objectives | 政府：角色与目标

The government is a major microeconomic decision maker because it can directly influence the allocation of resources, produce goods and services, and pass laws that shape market behaviour.

政府是重要的微观经济决策者，因为它能直接影响资源配置，提供商品和服务，并制定塑造市场行为的法律。

Governments pursue broad objectives such as economic growth, low unemployment, price stability and a balanced external trade position.

政府追求经济增长、低失业率、物价稳定和国际收支平衡等宏观目标。

At the microeconomic level, governments aim to correct market failure, protect vulnerable groups, encourage competition and ensure that socially important goods such as health and education are provided efficiently.

在微观经济层面，政府旨在纠正市场失灵、保护弱势群体、鼓励竞争，并确保健康和医疗等重要社会商品得到有效提供。

The government also makes decisions about how to raise income through taxation and how to allocate that spending among different public services.

政府还

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