📚 Taxes – Direct and Indirect | 税收——直接税与间接税
Taxes are compulsory payments to the government, levied on income, wealth, and expenditure. They form a key source of government revenue and are used to achieve various macroeconomic and microeconomic objectives, including income redistribution, stabilising the economy, and correcting market failures. This article explores the fundamental distinction between direct and indirect taxes, their characteristics, and their economic effects.
税收是强制向政府缴纳的款项，针对收入、财富和支出征收。它们是政府收入的主要来源，并被用来实现各种宏观和微观经济目标，包括收入再分配、稳定经济和纠正市场失灵。本文探讨直接税和间接税的基本区别、特征及其经济影响。
1. Defining Direct and Indirect Taxes | 直接税与间接税的定义
A direct tax is one that is levied on the income, wealth, or profit of individuals or firms, and the burden of the tax cannot be shifted onto someone else. The taxpayer is also the bearer of the tax. In contrast, an indirect tax is imposed on expenditure on goods and services, and the burden can be partly or fully passed on to consumers through higher prices. The taxpayer (e.g., a retailer) collects the tax and remits it to the government, but the economic incidence may fall on the end consumer.
直接税是针对个人或企业的收入、财富或利润征收的，税负无法转嫁到他人身上；纳税人即税负承担者。相比之下，间接税是对商品和服务的支出征收的，税负可以通过提高价格部分或全部转嫁给消费者。纳税人（如零售商）负责征收税款并上缴政府，但经济归宿可能落在最终消费者身上。
Direct taxes are often based on the ability-to-pay principle, as they can be tailored to an individual's financial circumstances. Indirect taxes, by contrast, are linked to spending decisions and are relatively invisible, as they are embedded in market prices.
直接税通常基于支付能力原则，因为它们可以根据个人的财务状况进行调整。而间接税与消费决策挂钩，且因包含在市场价格中，相对不易察觉。
2. Direct Taxes in Detail | 直接税详解
Direct taxes are typically levied on income and wealth. The most common example is personal income tax, where a percentage of an individual's earnings is taken by the government. Corporate tax is a direct tax on a company's profits. Other examples include capital gains tax (on profits from asset sales) and National Insurance contributions, which are payroll taxes paid by employers and employees to fund social security benefits and healthcare.
直接税通常针对收入和财富征收。最常见的例子是个人所得税，政府按比例从个人收入中征收。公司税是对企业利润征收的直接税。其他例子包括资本利得税（对出售资产所得利润征收）和国民保险缴款，这是由雇主和雇员支付的工资税，用于资助社会保障福利和医疗保健。
A key feature of many direct taxes is their progressive nature, meaning the marginal tax rate rises as income rises. They also act as automatic stabilisers: during economic booms, rising incomes push people into higher tax brackets, dampening aggregate demand; in a slump, tax payments fall, cushioning disposable income without any change in government policy.
许多直接税的一个关键特征是累进性，即边际税率随收入增加而提高。它们还能充当自动稳定器：在经济繁荣时期，收入增长使人们进入更高税级，从而抑制总需求；在经济衰退时，税收缴纳减少，能在不改变政府政策的情况下缓冲可支配收入的下降。
3. Indirect Taxes in Detail | 间接税详解
Indirect taxes are placed on the sale of goods and services. Value Added Tax (VAT) is an ad valorem tax added at each stage of production, ultimately paid by the final consumer. Excise duties are specific taxes on particular products such as alcohol, tobacco, and petrol, often imposed to discourage consumption (demerit goods) and raise government revenue. Customs duties are taxes on imported goods, used to protect domestic industries.
间接税是对商品和服务的销售征收的。增值税（VAT）是一种从价税，在生产各个环节加征，最终由终端消费者支付。消费税是对特定产品如酒类、烟草和汽油征收的特定税，通常旨在抑制消费（不良品）并增加政府收入。关税是对进口商品征收的税收，用于保护国内产业。
Because indirect taxes are not related to the taxpayer's income, they are often regressive, taking a higher proportion of income from low-income groups. They are, however, relatively easy to collect and less likely to distort work incentives compared with direct taxes.
由于间接税与纳税人的收入无关，它们往往具有累退性，从低收入群体获取的收入比例更高。然而，与直接税相比，间接税征管较为容易，且不太可能扭曲工作激励。
4. Progressive, Proportional, and Regressive Taxes | 累进税、比例税与累退税
A progressive tax takes a larger percentage of income from high-income earners than from low-income earners. Most income tax systems are progressive, with a tax-free personal allowance and rising marginal rates. A proportional tax takes the same percentage of income from all levels; some flat-rate income taxes or corporate taxes with a single rate fit this category. A regressive tax takes a larger proportion of income from low-income earners. Indirect taxes such as VAT, excise duties, and council tax (in its current form) are generally regressive because lower-income households spend a higher fraction of their income on these taxed items.
累进税是指高收入者缴纳的税款占其收入的比例高于低收入者。大多数所得税制度是累进的，设有免税个人免税额和递增的边际税率。比例税对所有收入水平征收相同比例；某些单一税率的所得税或公司税属于此类。累退税是指低收入者承担的税款占其收入的比例更高。间接税如增值税、消费税以及（现行形式的）市政税通常具有累退性，因为低收入家庭在应税商品上的支出占其收入的比例更高。
The choice between progressive and regressive tax structures involves a trade-off between equity and economic efficiency. Progressive direct taxes enhance income redistribution but may reduce work incentives, whereas regressive indirect taxes can raise revenue without discouraging earning effort, but they increase inequality.
在累进税制和累退税制之间的选择，涉及到公平与经济效率之间的权衡。累进的直接税促进收入再分配，但可能打击工作积极性；而累退的间接税可以在不打击赚钱意愿的情况下增加收入，却加剧了不平等。
5. How Taxation Affects Markets | 税收如何影响市场
ally upwards by the amount of the tax, from S to S+tax. The new equilibrium reflects a higher price paid by consumers (Pc) and a lower price retained by producers (Pp), such that Pc = Pp + t, where t is the per-unit tax. The quantity traded falls from Q1 to Q2, creating a deadweight loss—are that is lost to both consumers and producers and is not matched by government revenue.
当征收间接税时，生产者的成本增加。在供需图中，特定税使得供给曲线垂直上移税收金额，从S移动到S+税。新的均衡反映出消费者支付的更高价格（Pc）和生产者获得的更低净价（Pp），满足Pc = Pp + t，其中t为单位税额。交易量从Q1降至Q2，造成无谓损失——这部分福利在消费者和生产者之间损失了，且未能转化为政府收入。
Pc = Pp + t
An ad valorem tax causes the supply curve to pivot upwards, widening the absolute gap between consumer and producer prices at higher price levels. The more inelastic the demand or supply, the smaller the reduction in quantity and the larger the proportion of the tax that can be passed on to the other side of the market.
从价税使得供给曲线旋转上移，在更高的价格水平上拉大消费者价格与生产者价格之间的绝对差距。需求或供给越缺乏弹性，交易量下降越小，税收转嫁给市场另一方的比例也越大。
6. Tax Incidence and Elasticity | 税收归宿与弹性
The incidence of a tax, or who bears the final burden, depends on the price elasticities of demand (PED) and supply (PES). If demand is inelastic (for necessities like petrol in the short run), consumers are not very responsive to price rises, so they bear a larger share of the tax. If demand is elastic (for luxury goods), producers must absorb most of the tax by accepting a lower net price to avoid a sharp drop in sales. Similarly, when supply is inelastic—common in agricultural goods—producers cannot easily reduce output, and they end up bearing a greater tax burden. With elastic supply, more of the tax can be shifted to consumers.
税收归宿，即最终税负由谁承担，取决于需求价格弹性（PED）和供给价格弹性（PES）。如果需求缺乏弹性（如短期内对汽油等必需品），消费者对价格上涨反应不敏感，因此他们承担较大份额的税收。如果需求富有弹性（如奢侈品），生产者必须通过接受更低的净价格来承担大部分税收，以避免销量急剧下滑。同样，当供给缺乏弹性时——常见于农产品——生产者无法轻易减少产量，最终承担较大的税负。而当供给富有弹性时，更多的税负可以转嫁给消费者。
Understanding the relative elasticities is vital for policymakers. For example, imposing a high tax on cigarettes—a product with very inelastic demand—will raise considerable revenue and mainly be paid by consumers, while a similar tax on internet streaming subscriptions might see streaming firms absorb much of the burden.
了解相对弹性对政策制定者至关重要。例如，对香烟这种需求极为缺乏弹性的产品征收高税，不仅能带来可观的财政收入，且税负主要由消费者承担；而对互联网流媒体订阅征收类似的税，流媒体公司可能吸收大部分负担。
7. Specific and Ad Valorem Taxes | 特定税与从价税
A specific tax is a fixed sum charged per unit of output, such as £0.50 per litre of alcohol. It causes a parallel upward shift of the supply curve. Its main advantage is simplicity, and it ensures stable revenue per unit regardless of price changes. However, during inflation, the real burden of a specific tax declines unless adjusted.
特定税是对每单位产出征收的固定金额，例如每升酒精征收0.50英镑。它使得供给曲线平行上移。其主要优点是简单，无论价格如何变化，都能保证每单位的稳定收入。但在通货膨胀期间，特定税的实际负担会下降，除非进行调整。
An ad valorem tax is expressed as a percentage of the price, such as 20% VAT. The supply curve swivels upward because the tax per unit rises as the price rises. This type of tax maintains its value in real terms as prices increase and is therefore more buoyant. It also automatically generates higher revenue from expensive goods, adding a degree of progressivity if luxury items face higher rates.
从价税是按价格百分比表示的，例如20%的增值税。由于每单位税额随价格上升而增加，供给曲线向上旋转移动。这种税收在价格上升时能够保持实际价值，因此更富有弹性增长能力。它还能自动从高价商品中获取更多收入，如果奢侈品适用更高税率，还能增加一定的累进性。
8. Using Taxes to Correct Negative Externalities | 利用税收纠正负外部性
An indirect tax can be used to internalise the external costs of production or consumption. When a good generates negative externalities—for example, air pollution from factories or health costs from smoking—the free market overproduces it. By imposing a tax equal to the marginal external cost at the socially optimal output, the government shifts the supply curve (or demand curve, in the case of a consumption-side tax) upward, reducing quantity to the socially efficient level. This is called a Pigouvian tax.
间接税可用于内部化生产或消费的外部成本。当一种商品产生负外部性时——例如工厂的空气污染或吸烟带来的健康成本——自由市场会过度生产。政府通过对社会最优产出水平下的边际外部成本征收等额的税收，使供给曲线（如果是消费税则使需求曲线）上移，将产量降低到社会效率水平。这就是庇古税。
Examples include taxes on carbon emissions, plastic bags, sugary drinks, and alcohol. Such taxes can produce a 'double dividend': they reduce the harmful activity while generating revenue that can be used to lower other distortionary taxes. However, setting the correct tax rate is challenging because marginal external costs are difficult to quantify. Politically, such taxes may be regressive and face public resistance.
例子包括对碳排放、塑料袋、含糖饮料和酒精的征税。这类税收可以产生“双重红利”：减少有害行为的同时创造收入，可用于降低其他扭曲性税收。然而，设定正确的税率具有挑战性，因为边际外部成本难以量化。从政治角度看，这类税收可能具有累退性并遭遇公众抵制。
9. The Laffer Curve and Supply-Side Effects | 拉弗曲线与供给侧效应
The Laffer Curve illustrates the theoretical relationship between tax rates and total tax revenue. It suggests that starting from a 0% rate, raising rates initially increases revenue, but beyond a certain optimal point, further increases stifle economic activity so much that total revenue falls. At a tax rate of 100%, revenue would be zero because no one would have an incentive to earn taxable income. The curve implies there is a revenue-maximising tax rate, although its exact shape and peak are empirical questions.
拉弗曲线说明了税率与税收总收入之间的理论关系。它表明，从0%的税率开始，提高税率最初会增加收入，但超过某个最优临界点后，进一步提高税率会严重抑制经济活动，使总收入下降。在100%的税率下，收入将为零，因为没有人会有动力去赚取应税收入。这条曲线意味着存在一个使收入最大化的税率，尽管其具体形状和峰值是实证问题。
High direct taxes can reduce work incentives: a high marginal income tax rate may discourage overtime or career progression, while high corporate taxes can reduce business investment and encourage firms to relocate. On the other hand, well-designed indirect taxes have less impact on labour supply but may encourage the development of a shadow economy if VAT reaches extreme levels. Supply-side economists advocate for moderate tax rates to promote long-run economic growth.
高直接税可能会降低工作积极性：高边际所得税率可能打击加班或职业晋升意愿，高公司税可能减少企业投资并促使企业迁址。另一方面，设计良好的间接税对劳动供给影响较小，但如果增值税达到极端水平，可能会催生影子经济。供给侧经济学家主张适度的税率，以促进长期经济增长。
10. Evaluation: Direct vs. Indirect Taxes | 评价：直接税与间接税的比较
Direct taxes have strong redistributive effects and serve as built-in stabilisers. They align with the ability-to-pay principle and can be designed to protect low-income groups. However, they can be complex to administer, create disincentives for work and enterprise, and are more visible, which may cause taxpayer resentment. Tax evasion and avoidance are also significant concerns, especially with high marginal rates.
直接税具有较强的再分配效应，并可充当内置稳定器。它们符合支付能力原则，并能设计成保护低收入群体。然而，它们可能征管复杂，对工作和创业产生负激励，而且更加显眼，可能引起纳税人的不满。逃税和避税也是重大关切，特别是当边际税率较高时。
Indirect taxes are simpler and cheaper to collect, can target demerit goods, and do not directly penalise income generation. They are less visible and can be avoided by changing spending patterns, giving consumers some choice. But they are generally regressive, can contribute to cost-push inflation if rates are raised suddenly, and may fail to internalise externalities accurately if not well-targeted. In practice, most governments use a mix of direct and indirect taxation to balance these trade-offs. A diversified tax base with moderate rates fosters both equity and efficiency.
间接税征收更简单、成本更低，可针对不良品，且不直接惩罚创收行为。它们不太显眼，可通过改变消费模式来规避，给消费者一定的选择权。但它们通常具有累退性，若税率突然提高可能导致成本推动型通货膨胀，而且如果目标不够精准，可能无法准确内部化外部性。在实践中，大多数政府混合使用直接税和间接税来平衡这些权衡。一个多元化的税基和适度的税率能够促进公平与效率。
Published by TutorHao | Economics Revision Series | aleveler.com
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