📚 Functions and Characteristics of Money | 货币的职能与特征解析
Money is one of the most fundamental concepts in economics. It is not merely cash or coins, but anything that is widely accepted in exchange for goods and services. In this article, we will explore the core functions of money and the characteristics that make an asset suitable to serve as money, with specific reference to the CIE A-Level Economics syllabus.
货币是经济学中最基本的概念之一。它不仅仅是现金或硬币，而是任何被广泛接受以换取商品和服务的东西。在本文中，我们将结合 CIE A-Level 经济学考纲，深入探讨货币的核心职能以及使一种资产适合充当货币的特征。
1. The Definition of Money | 货币的定义
In economics, money is defined by its functions rather than its physical form. Anything that performs the functions of money can be considered money. This includes cash, bank deposits, and in modern times, digital currencies.
在经济学中，货币是由其职能而非物理形态来定义的。任何能够履行货币职能的东西都可以被视为货币。这包括现金、银行存款，以及在现代还包括数字货币。
It is important to distinguish money from wealth and income. Wealth is the stock of assets owned by a person or society, while income is the flow of earnings over a period of time. Money is a subset of wealth, but not all wealth is money.
区分货币与财富和收入非常重要。财富是个人或社会拥有的资产存量，而收入是一段时间内的收入流量。货币是财富的一部分，但并非所有财富都是货币。
2. Primary Function: Medium of Exchange | 首要职能：交换媒介
The most essential function of money is to act as a medium of exchange. It eliminates the need for a double coincidence of wants, which is the main problem under a barter system. In a barter economy, a person who wants to buy rice must find someone who wants to sell rice and also wants what the buyer has to offer.
货币最基本的职能是充当交换媒介。它消除了对需求双重巧合的依赖，而这正是物物交换体系下的主要问题。在物物交换经济中，想买米的人必须找到一位既想卖米又想要买方所提供物品的人。
With money, transactions become simple and efficient. A worker accepts money in exchange for labour, and then uses that money to buy goods from others. Money acts as an intermediary, allowing specialisation and the division of labour to flourish.
有了货币，交易变得简单而高效。工人接受货币作为劳动的报酬，然后用这些钱向他人购买商品。货币充当中间媒介，使专业化和劳动分工得以蓬勃发展。
3. Unit of Account | 计价单位
Money serves as a unit of account, meaning it provides a common measure of value in which prices are quoted and accounts are kept. For example, the price of a laptop might be $800, and the price of a shirt might be $20. This allows consumers and firms to compare the relative value of different goods easily.
货币用作计价单位，意味着它提供一种共同的价值衡量标准，用于报价和记账。例如，一台笔记本电脑的价格可能是 800 美元，一件衬衫的价格可能是 20 美元。这使消费者和企业能够轻松比较不同商品的相对价值。
Without a unit of account, the price of every good would have to be expressed in terms of every other good. With n goods, there would be n(n-1)/2 prices, which is hugely inefficient. Money simplifies this to just n prices.
如果没有计价单位，每种商品的价格都必须用其他每种商品来表示。若有 n 种商品，则会有 n(n-1)/2 个价格，效率极低。货币将这一数量简化到仅仅 n 个价格。
4. Store of Value | 价值储藏
Money allows people to transfer purchasing power from the present to the future. If you earn money today, you can choose to save it and spend it next year. This function is called a store of value. It enables saving and future planning.
货币使人们能够将购买力从现在转移到未来。如果你今天赚了钱，你可以选择将其储蓄起来留到明年再花。这一职能被称为价值储藏。它使储蓄和未来规划成为可能。
However, inflation erodes the real value of money. If the price level rises, the same amount of money buys fewer goods tomorrow. Therefore, money is not a perfect store of value when inflation is high. In contrast, assets like property or gold may better preserve value in inflationary periods, but they are less liquid.
然而，通货膨胀会侵蚀货币的实际价值。如果物价水平上涨，同样数量的货币明天能买到的商品会减少。因此，在通货膨胀较高时，货币并非完美的价值储藏手段。相比之下，房产或黄金等资产在通胀时期可能更能保值，但它们的流动性较低。
5. Standard of Deferred Payment | 延期支付标准
Money also functions as a standard of deferred payment. This means it is used to settle debts that are payable in the future. Contracts, loans, and mortgages are all denominated in money. Lenders accept money as the future repayment because it is widely accepted and its value is relatively stable over time.
货币还充当延期支付标准。这意味着它被用于结算未来才需要支付的债务。合同、贷款和抵押贷款都以货币计价。贷方接受货币作为未来的还款，是因为货币被广泛接受，并且其价值在时间上相对稳定。
This function is crucial for the credit system. Without a reliable standard of deferred payment, borrowing and lending would be extremely risky. Expected inflation must be considered: if prices rise unexpectedly, borrowers repay with money that is worth less in real terms.
这一职能对于信用体系至关重要。如果没有可靠的延期支付标准，借贷将变得极其危险。必须考虑预期通胀：如果物价意外上涨，借款人还款时使用的货币实际价值会下降。
6. Additional Function: Liquidity | 附加职能：流动性
Although not always listed as a primary function, liquidity is closely related to money. Liquidity refers to how easily an asset can be converted into a medium of exchange without loss of value. Money itself is the most liquid asset because it can be used directly for transactions.
虽然流动性不一定总被列为主要职能，但它与货币密切相关。流动性是指资产在不损失价值的情况下转换成交换媒介的难易程度。货币本身就是流动性最强的资产，因为它可以直接用于交易。
Other assets, such as government bonds or real estate, are less liquid because converting them into cash involves time, transaction costs, and possibly a loss in value. The degree of liquidity affects how money is measured in statistics like M0, M1, M2, and M3.
其他资产，如政府债券或房地产，流动性较低，因为将它们转换为现金需要时间、交易成本，并且可能遭受价值损失。流动性程度会影响货币在 M0、M1、M2 和 M3 等统计指标中的测量方式。
7. Characteristics of Money: Durability and Portability | 货币的特征：耐久性和便携性
For any item to function effectively as money, it must possess certain physical characteristics. Durability means that money must be able to withstand wear and tear over many transactions. Paper notes and metal coins are designed to last, while perishable goods like fruit cannot serve as money.
任何物品要有效地充当货币，必须具备某些物理特征。耐久性意味着货币必须能够经受住多次交易中的磨损。纸币和金属硬币被设计为耐用品，而水果等易腐烂的物品则不能充当货币。
Portability means that money must be easy to carry and transfer. A good money system allows high-value transactions without requiring heavy or bulky items. For example, paper money is much more portable than gold coins of equal value, and digital payments are even more portable.
便携性意味着货币必须易于携带和转移。一个良好的货币体系允许高价值交易而不需要沉重或笨重的物品。例如，纸币比等值的金币便携得多，数字支付则更加便捷。
These two characteristics are essential for a convenient medium of exchange. In modern economies, money has increasingly become electronic, which makes portability virtually unlimited.
这两个特征对于便利的交换媒介至关重要。在现代经济中，货币日益电子化，这使得便携性几乎不受限制。
8. Characteristics of Money: Divisibility and Uniformity | 货币的特征：可分性和均质性
Divisibility refers to the ability to break money into smaller units to enable purchases of varying values. A $100 note can be exchanged for smaller denominations or change. Divisibility ensures that money can price goods precisely and that small transactions can take place.
可分性是指货币能够分割成更小单位以支持不同价值购买的能力。100 美元的钞票可以兑换成更小面额或零钱。可分性确保货币能够为商品精确定价，并保证小额交易能够进行。
Uniformity means that identical units of money have exactly the same value, regardless of their physical form. For example, a $10 note issued by a central bank is worth the same as any other $10 note. This quality is necessary for money to act as a reliable unit of account.
均质性意味着相同的货币单位具有完全相同的价值，无论其物理形态如何。例如，中央银行发行的 10 美元纸币与任何其他 10 美元纸币价值相同。这一质量对于货币作为可靠的计价单位是必要的。
Uniformity also helps prevent counterfeiting, as money must be difficult to forge while remaining standardised. Central banks use advanced security features to maintain public confidence.
均质性也有助于防止伪造，因为货币必须难以仿制，同时又保持标准化。中央银行使用先进的安全特征来维持公众信心。
9. Characteristics of Money: Limited Supply and Acceptability | 货币的特征：供给有限性和可接受性
Limited supply is a crucial characteristic of money. If money were available in unlimited quantities, it would lose its value rapidly through hyperinflation. Central banks manage the money supply to maintain its purchasing power and avoid excessive inflation.
供给有限性是货币的一个关键特征。如果货币可以无限量供应，它将通过恶性通货膨胀迅速失去价值。中央银行管理货币供应量以维持其购买力并避免过度通货膨胀。
Acceptability means that everyone in the economy is willing to accept money in exchange for goods and services. Money has value because of collective faith and legal tender laws. If people lose confidence in a currency, it ceases to function as money, as seen in episodes of extreme hyperinflation.
可接受性意味着经济中的每个人都愿意接受货币以换取商品和服务。货币之所以有价值，是因为集体信任以及法定货币法律。如果人们对一种货币失去信心，它就不再作为货币发挥作用，正如在极端恶性通货膨胀事件中所见。
Thus, the value of money is not intrinsic; it derives from its social acceptance and the stability of its supply.
因此，货币的价值并非内在固有；它来源于社会接受度以及其供应的稳定性。
10. Commodity Money, Fiat Money, and Bank Deposits | 商品货币、法定货币与银行存款
Historically, money took the form of commodities such as gold, silver, salt, or cattle. Commodity money has intrinsic value and often satisfies the characteristics of durability, divisibility, and portability to varying degrees. However, it can be heavy and its supply may be unstable.
历史上，货币以黄金、白银、盐或牛等商品的形式存在。商品货币具有内在价值，通常在不同程度上满足耐久性、可分性和便携性的特征。然而，它可能沉重，且供应可能不稳定。
Fiat money is money without intrinsic value, declared by a government to be legal tender. Modern economies use fiat money because it gives the central bank control over the money supply, enabling monetary policy. Fiat money relies entirely on trust.
法定货币是没有内在价值的货币，由政府宣布为法定偿债货币。现代经济体使用法定货币，因为它使中央银行能够控制货币供应，从而实施货币政策。法定货币完全依赖于信任。
Bank deposits, especially demand deposits in commercial banks, also function as money. They are accepted for payment through cheques, debit cards, and online transfers. These are sometimes called "bank money" and form the largest component of modern money supply.
银行存款，特别是商业银行中的活期存款，也作为货币发挥作用。它们通过支票、借记卡和在线转账被接受用于支付。这些有时被称为“银行货币”，是现代货币供应中最大的组成部分。
11. Digital Money and Cryptocurrencies | 数字货币与加密货币
In recent decades, digital money has expanded beyond traditional bank deposits. Mobile payment systems and central bank digital currencies (CBDCs) have increased the efficiency of transactions. These forms of money still perform the functions of money, provided they are accepted and stable.
近几十年来，数字货币已扩展到传统银行存款之外。移动支付系统和中央银行数字货币提高了交易效率。只要被接受且稳定，这些货币形式仍然履行货币的职能。
Cryptocurrencies like Bitcoin, however, are controversial. Bitcoin is portable and divisible, but it is not widely accepted as a medium of exchange, and its price volatility makes it a poor store of value and unit of account. Thus, most economists do not classify cryptocurrencies as money yet.
然而，像比特币这样的加密货币是有争议的。比特币具有便携性和可分性，但它未被广泛接受为交换媒介，而且其价格波动使其难以成为良好的价值储藏和计价单位。因此，大多数经济学家尚未将加密货币归为货币。
12. Exam Focus and Common Misconceptions | 考试重点与常见误区
In CIE A-Level Economics, students often confuse the functions and characteristics of money. Remember: functions are roles money performs in the economy (medium of exchange, unit of account, store of value, standard of deferred payment), while characteristics are physical or institutional properties (durability, portability, divisibility, uniformity, limited supply, acceptability).
在 CIE A-Level 经济学考试中，学生常常混淆货币的职能与特征。请记住：职能是货币在经济中所扮演的角色（交换媒介、计价单位、价值储藏、延期支付标准），而特征则是物理或制度属性（耐久性、便携性、可分性、均质性、供给有限性、可接受性）。
Another common error is stating that money is the same as income or wealth. Money is a stock concept, while income is a flow. Additionally, "store of value" does not mean money is perfectly safe from inflation; it merely means it can transfer purchasing power over time, though inflation may reduce it.
另一个常见错误是认为货币等同于收入或财富。货币是存量概念，而收入是流量概念。此外，“价值储藏”并不意味着货币完全不受通货膨胀影响；它仅仅意味着货币可以随时间转移购买力，尽管通胀可能会减少这种购买力。
Finally, when answering essay questions, always illustrate each function with real-world examples and explain how a failure of a characteristic undermines money's viability. This will show analytical depth and earn higher marks.
最后，在回答论文题时，务必用现实世界中的例子说明每种职能，并解释某一特征的缺失如何削弱货币的可行性。这样能展示分析深度并获得更高的分数。
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