📚 Classification of Goods and Services | 商品与服务的分类
In economics, the classification of goods and services is fundamental for understanding how markets work, how resources are allocated, and how different types of output affect welfare. This article examines the key ways economists categorise goods and services, from free goods to public goods, normal goods to inferior goods, and more.
在经济学中，商品与服务的分类对于理解市场运行、资源配置以及不同产出如何影响福利至关重要。本文将探讨经济学家对商品和服务进行分类的主要方法，从免费物品到公共物品，从正常物品到低档物品等。
1. Introduction to Goods and Services | 商品与服务概述
Goods are tangible items that can be seen and touched, such as food, clothing, and machinery. Services are intangible activities that provide value but do not result in the ownership of a physical product, such as education, healthcare, and transportation. Together, goods and services represent the output of an economy.
商品是可以看见和触摸的有形物品，如食品、服装和机械。服务是提供价值但不会导致实物产品所有权的无形活动，如教育、医疗和交通运输。商品和服务共同构成了一个经济体的产出。
Economists classify goods and services according to various criteria, including scarcity, use, durability, rivalry and excludability in consumption, and the effect of income changes. These classifications aid policy-making, business strategy, and the understanding of consumer behaviour.
经济学家根据多种标准对商品和服务进行分类，包括稀缺性、用途、耐用性、消费中的竞争性与排他性以及收入变化的影响。这些分类有助于制定政策、商业策略以及理解消费者行为。
2. Free Goods and Economic Goods | 免费物品与经济物品
Free goods are those that are abundant in supply relative to demand and have no opportunity cost. They are not scarce, so they do not command a price under normal conditions. Examples include air, sunshine, and sea water in open access areas.
免费物品是相对于需求而言供给充裕且没有机会成本的物品。它们不稀缺，因此在正常情况下不具有价格。例子包括空气、阳光以及开放水域的海水。
Economic goods are scarce relative to the wants they satisfy, so their use involves an opportunity cost. Because of scarcity, they have a positive price in the market. Most goods and services in an economy, from bread to smartphones, are economic goods.
经济物品相对于其所满足的需求而言是稀缺的，因此使用它们涉及机会成本。由于稀缺性，它们在市场上具有正价格。经济中的大多数商品和服务，从面包到智能手机，都是经济物品。
The distinction is important because it highlights the fundamental economic problem of scarcity and the need for choice.
这一区分很重要，因为它突出了稀缺性这一基本经济问题以及选择的必要性。
3. Consumer Goods and Capital Goods | 消费品与资本品
Consumer goods are goods and services that directly satisfy human wants and needs. They can be divided into durable consumer goods (e.g. furniture, cars), non-durable consumer goods (e.g. food, drinks), and consumer services (e.g. haircuts, banking).
消费品是直接满足人类欲望和需求的商品和服务。它们可分为耐用消费品（如家具、汽车）、非耐用消费品（如食品、饮料）和消费性服务（如理发、银行服务）。
Capital goods (also called producer goods) are goods used to produce other goods and services. They do not directly satisfy consumer wants but increase the future productive capacity of the economy. Examples include machinery, factories, and vehicles used for business purposes.
资本品（也称生产者物品）是用于生产其他商品和服务的物品。它们不直接满足消费者欲望，但会提高经济未来的生产能力。例子包括机器、工厂和用于商业目的的车辆。
Some goods can be consumer goods or capital goods depending on their use. For instance, a computer bought by a business is a capital good, while one bought by a household is a consumer good.
某些商品根据其用途可以是消费品或资本品。例如，企业购买的电脑是资本品，而家庭购买的是消费品。
4. Durable and Non-Durable Goods | 耐用品与非耐用品
Durable goods are goods that provide a stream of services over a long period, typically more than a year, and do not wear out quickly. Examples include refrigerators, vehicles, and smartphones.
耐用品是指在较长时间内（通常一年以上）提供持续服务、不会很快磨损的商品。例子包括冰箱、车辆和智能手机。
Non-durable goods are items that are consumed quickly or have a short lifespan, often used up in one or a few uses. Examples include fresh food, fuel, and toiletries.
非耐用品是指消费迅速或使用寿命短、通常一次或几次就用完的物品。例子包括生鲜食品、燃料和洗漱用品。
This classification helps analyse patterns of consumer spending and business cycles. Spending on durable goods is often more sensitive to interest rates and consumer confidence, and tends to fluctuate more during recessions.
这种分类有助于分析消费者支出模式和经济周期。耐用品的支出往往对利率和消费者信心更为敏感，并且在衰退期间波动更大。
5. Merit Goods and Demerit Goods | 优值品与劣值品
Merit goods are goods and services that the government feels people will under-consume if left to the market, and which have positive externalities. Examples include education, healthcare, and public libraries. The government may provide them free at the point of use or subsidise them to encourage consumption.
优值品是指如果由市场决定，人们会消费不足、且具有正外部性的商品和服务。例子包括教育、医疗和公共图书馆。政府可能免费提供或给予补贴以鼓励消费。
Demerit goods are goods and services that are considered harmful to consumers or society and tend to be over-consumed if left to market forces. They often carry negative externalities. Examples include cigarettes, alcohol, and junk food. Governments may impose taxes, regulations, or information campaigns to discourage their consumption.
劣值品是指被认为对消费者或社会有害，若任由市场力量决定则会被过度消费的商品和服务。它们通常带有负外部性。例子包括香烟、酒精和垃圾食品。政府可能通过征税、监管或宣传运动来抑制消费。
The concepts of merit and demerit goods rest on the idea that consumer sovereignty may not always lead to socially optimal outcomes due to imperfect information or irrational behaviour.
优值品和劣值品的概念基于这样一种观点：由于信息不完全或非理性行为，消费者主权并不总能带来社会最优结果。
6. Public Goods and Private Goods | 公共物品与私人物品
Private goods are characterised by both excludability and rivalry in consumption. Excludability means that it is possible to prevent people who have not paid from consuming the good. Rivalry means that one person's consumption reduces the amount available for others. Most goods bought and sold in markets, like clothing and meals, are private goods.
私人物品的特点是消费上的排他性和竞争性。排他性意味着能够阻止未付费者消费该物品。竞争性意味着一个人的消费会减少可供他人消费的数量。市场上买卖的大多数商品，如服装和餐饮，都属于私人物品。
Public goods are non-excludable and non-rivalrous. It is impossible or extremely costly to exclude anyone from benefiting from them, and one person's use does not diminish availability for others. Classic examples include national defence, street lighting, and clean air.
公共物品具有非排他性和非竞争性。无法或需要极高成本才能阻止任何人从中受益，且一个人的使用不会减少他人的可用性。典型例子包括国防、路灯和清洁空气。
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