JAMB UTME - Economics - 2023

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A tariff is a tax that is imposed on imported goods. It is a financial charge that a government puts on goods that are being brought into the country. The purpose of a tariff is to protect domestic industries and businesses from competition from imported goods. By placing a tax on imported goods, it becomes more expensive for consumers to buy those goods, making them less appealing compared to domestic alternatives. This gives domestic industries a competitive advantage and helps support local businesses and jobs. So, the correct answer is imported goods.

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The correct term for the number of people who are qualified to work and who offer themselves for employment is the working population.
The working population refers to the subset of the total population that is actively engaged or seeking employment. It includes individuals who are qualified, available, and willing to work. This encompasses both employed individuals and those who are actively looking for work, such as job seekers.
The working population is an important measure for understanding the labor market. It helps policymakers, businesses, and economists in assessing the job market's health and determining factors such as employment rates, labor force participation, and unemployment rates.
Options like "mobility of labor" and "migrant labor" focus on the movement of workers between different locations, which is a related concept but not the same as the total number of qualified individuals available for employment. "Labor turnover" refers to the rate at which workers leave and join a particular company or industry, which is also not synonymous with the working population as a whole.
Therefore, the working population is the term that correctly describes the number of qualified individuals who are available for employment.

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The demand for a good is price inelastic if the price elasticity is less than one. Price elasticity measures how responsive the quantity demanded of a good is to a change in its price. If the price elasticity is less than one, it means that the quantity demanded is not very responsive to changes in price. In other words, a change in price will have a relatively small impact on the quantity demanded. Even if the price increases or decreases, people will still buy a similar amount of the good. This can happen when the good is a necessity or when there are limited substitutes available. For example, if the price of water increases, people will still need to buy a similar amount because water is essential for survival. Similarly, if the price of a specific medication increases, people with no alternative options will still purchase it regardless of the price. Therefore, when the price elasticity is less than one, we say that the demand for the good is price inelastic.

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The marginal propensity to consume (MPC) is a measure of how much of an increase in income is typically spent on consumption. It is represented by the symbol c or ΔC/ΔY. To explain it simply, the MPC tells us the proportion of additional income that is used for consumption rather than saving or other purposes. For example, if the MPC is 0.8, it means that for every additional unit of income, 0.8 units are typically spent on consumption. The MPC can also be understood as the slope of the consumption function. The consumption function is a mathematical relationship between income and consumption. The MPC represents how much consumption changes for a given change in income. In the equation C = C + cYd, the coefficient c represents the MPC. This equation shows that consumption (C) is determined by autonomous consumption (C) plus the product of the MPC (c) and disposable income (Yd). In summary, the MPC is a measure of how much additional income is typically used for consumption. It can be represented as ΔC/ΔY, the slope of the consumption function, or the coefficient c in the consumption equation.

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Based on the graph, the consumer is at equilibrium at point k.

Equilibrium is when the quantity demanded by the consumer is equal to the quantity supplied by the market. At equilibrium, there is no shortage or surplus of the goods or services.

Point k on the graph represents the intersection of the demand curve (D) and the supply curve (S). At this point, the quantity demanded (Qd) and the quantity supplied (Qs) are equal.

If the consumer is at any other point on the graph, either to the left or to the right of point k, there would be either a shortage or a surplus of the goods or services. This would mean that the demand and supply are not in balance and the market is not at equilibrium.

Therefore, point k is the correct answer as it represents the position where the consumer is at equilibrium.

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A persistence rise in the prices of inputs, such as raw materials or labor, can lead to **cost push inflation**. Cost push inflation occurs when the increased costs of production for firms are passed on to consumers in the form of higher prices for goods and services. This can happen when the prices of inputs used in production rise over a sustained period. When input costs increase, businesses often have two options: absorb the increased costs and accept lower profit margins, or pass on the higher costs to consumers by raising prices. If firms choose to raise prices, it can lead to a general increase in the overall price level in the economy. Here's a simple example to help illustrate this concept: Let's say there is a town where the main industry is manufacturing shoes. The cost of leather, which is a key input in shoe production, starts to rise due to factors like high demand or scarcity. In response, shoe manufacturers have to pay more for leather, and this increases their production costs. To maintain their profit margins, the manufacturers decide to increase the prices of shoes they sell to retailers. Now, if the retailers decide to pass on the higher costs to the consumers, the prices of shoes will increase. This can create a ripple effect throughout the economy because consumers will have to spend more money on shoes, reducing their purchasing power for other goods and services. As a result, the overall price level in the economy increases, and this is what we call cost push inflation. It is important to note that cost push inflation is different from demand pull inflation. Demand pull inflation occurs when there is an increase in aggregate demand, leading to an excess of demand over supply. In contrast, cost push inflation is driven by increased production costs. Hyperinflation, on the other hand, is an extreme form of inflation characterized by an uncontrollable increase in prices. It is typically caused by factors like rapid money supply growth or loss of confidence in the currency. Stagflation refers to a situation where there is a combination of high inflation and high unemployment, typically accompanied by low economic growth. This can occur when an economy experiences a supply-side shock, such as a significant increase in the prices of key inputs. In summary, a persistence rise in the prices of inputs can lead to cost push inflation, as firms pass on the increased costs to consumers by raising prices.

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The diagram above represents the production possibility curve.
The production possibility curve shows the different combinations of goods and services that can be produced given the available resources and technology.
On the curve, each point represents a specific combination of goods and services that can be produced. Points on the curve are considered efficient because all available resources are fully utilized. Points inside the curve represent inefficient production because resources are not fully utilized. Points outside the curve represent combinations that are currently unattainable given the available resources and technology.
In summary, the production possibility curve helps us understand the trade-offs and limitations in production based on available resources and technology. It is a visual representation of the production possibilities in an economy.

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Financial intermediaries serve as links between surplus and deficit units in an economy. These intermediaries include banks, credit unions, and other financial institutions. When there is surplus money in the economy, individuals and businesses deposit the excess funds with financial intermediaries. These intermediaries then pool these funds together and make them available to deficit units, such as individuals or businesses in need of loans or financing. Financial intermediaries play a crucial role in the economy by efficiently allocating funds from surplus units to deficit units. They match the needs of borrowers with the resources of savers, helping to facilitate economic growth and development. Tax officers and pension offices, on the other hand, do not serve as direct links between surplus and deficit units. Tax officers collect taxes for the government, while pension offices manage pension funds for retired individuals. Although these entities may indirectly impact the allocation of funds in the economy, their primary roles are different from that of financial intermediaries. Acceptance houses are also not direct links between surplus and deficit units. Acceptance houses provide short-term financing through the purchase of bills of exchange. While they play a role in facilitating trade between businesses, their function is more specific and limited compared to the broader role of financial intermediaries. In summary, financial intermediaries such as banks and credit unions serve as the primary links between surplus and deficit units in an economy. They gather surplus funds from savers and make them available to borrowers, thereby promoting the efficient allocation of resources.

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The fundamental problem of Economics is Scarcity. Scarcity explains the basic economic problem that the world has limited or scarce resources to meet seemingly unlimited wants, and this reality forces people to make decisions about how to allocate resources in the most efficient way.

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An increase in the real GDP will increase the demand for money and also the interest rate will also increase.

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Point 'E" inside the graph indicates it is technologically inefficient" , Underemployed" or wide spread unemployent" or resources are not fully utilized or production inefficient"

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The measure that is presently used in Nigeria to measure inflation is the Consumer Price Index (CPI). The CPI is a commonly used indicator worldwide to track changes in the cost of living over time.
The Consumer Price Index (CPI) measures the average price changes of a basket of goods and services typically purchased by households in a specific country or region. It reflects the price movements of essential items such as food, housing, transportation, healthcare, education, and many other goods and services that people consume regularly.
The CPI is calculated by collecting price data for various items in the basket and assigning them weights based on their relative importance in household spending. The prices are then compared to a base period, which is usually a specific year. The percentage change in the CPI from the base period indicates the rate of inflation or deflation.
In Nigeria, the CPI is used to monitor and analyze changes in the cost of goods and services, allowing policymakers and economists to assess the impact on consumers' purchasing power and make informed decisions. It helps in determining the effectiveness of government policies, evaluating the performance of the economy, and adjusting wages and prices.
By tracking the CPI, the government can identify if there is an increase in the general level of prices, indicating inflation, or a decrease, indicating deflation. This information helps in formulating monetary and fiscal policies to control inflation rates and maintain price stability.
Overall, the Consumer Price Index (CPI) is the measure currently used in Nigeria to gauge inflation and is crucial in understanding how the cost of living changes over time, impacting the economy and the daily lives of individuals and businesses.

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Q = 14, P = 4

Qd = 30 - 4p

∆q/∆p = - 4
 

Ed = ΔqΔp×pq $\frac{<br>}{}$

= - 4 x 4/14

= Ed = -1.14
since price elasticity is positive, then Ed = 1.14

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If GDP falls, then people demand less money for transactions. As interest rate rise (fall), the demand for money will fall(rise).

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A quota on imports is a restriction imposed by a government on the quantity of goods that can be imported into a country. It is typically done to protect domestic industries and promote economic growth.

Out of the given options, a government imposing a quota on imports would not be done to decrease tax revenue. In fact, the purpose of implementing import quotas is quite the opposite – to increase tax revenue by protecting domestic industries and promoting their growth.

Let's understand this further:

1. To support strategic industry: One of the main reasons governments impose import quotas is to protect and support domestic industries that are considered strategically important for the country's economy. By limiting imports, the government aims to give domestic industries an advantage by reducing competition from foreign firms.

2. To prevent dumping: Dumping refers to the practice of selling goods in another country at prices lower than their production costs or market value. This undermines domestic industries and poses a threat to their survival. By imposing import quotas, the government can control the influx of dumped products and protect domestic industries from unfair competition.

3. To decrease tax revenue: This option is incorrect because imposing import quotas does not aim to decrease tax revenue. When imports are restricted, domestic industries have less competition, which allows them to charge higher prices. As a result, the government can collect more tax revenue from these higher-priced goods, thus increasing its overall revenue.

4. Employment opportunity: Another reason governments may impose import quotas is to create employment opportunities. By limiting imports, domestic industries can expand their production and hire more workers to meet the local demand. This helps in reducing unemployment and improving the overall economic conditions of the country.

In conclusion, the correct answer is that a government would not impose a quota on imports to decrease tax revenue. Import quotas are intended to protect strategic industries, prevent dumping, and create employment opportunities, while also increasing tax revenue.

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The type of price elasticity of demand for a commodity whose quantity demanded remains unchanged despite changes in the price is **perfectly inelastic**. When the demand for a commodity is perfectly inelastic, it means that the quantity demanded does not respond at all to changes in price. This usually occurs when there are no close substitutes for the commodity, or when the commodity is a necessity that people cannot easily do without. To understand it in a simple way, imagine a situation where the price of a life-saving medication for a critical illness increases significantly. In such a case, even if the price increases, the quantity demanded for the medication will remain the same because the individuals who need it have no other option but to purchase it at any cost. Therefore, the demand for such a medication is perfectly inelastic, as it does not change with variations in price. In summary, when the demand for a commodity is perfectly inelastic, it means that consumers are willing to pay any price for it, and the quantity demanded does not change despite fluctuations in price.

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Business cycle are intervals of expansion followed by recession in economic activity. It is characterized by general upswings and downturns in a span of macroeconomics variable.

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The government uses various methods to redistribute income in society. Three of these ways are market intervention, transfer earnings, and taxation. Market intervention involves the government stepping in and regulating certain aspects of the economy to ensure fairness and reduce income inequality. For example, the government may set a minimum wage so that workers are guaranteed a certain level of income. Transfer earnings refer to government programs that provide financial assistance to individuals or families who are in need. These programs include welfare, unemployment benefits, and social security. The goal is to provide support to those who may have lower incomes or are facing financial difficulties. Taxation is another method used by the government to redistribute income. Through taxes, the government collects money from individuals and businesses based on their income or profits. This revenue is then used to fund public services such as healthcare, education, infrastructure, and social programs. However, the answer to the question is that the government does not use limited liability as a way to redistribute income. Limited liability is a legal concept that protects individuals from being personally liable for the debts and liabilities of a company. It is not directly related to income redistribution. In summary, the government redistributes income through market intervention, transfer earnings, and taxation. These methods aim to promote fairness and provide support to those in need. However, limited liability is not a method used for income redistribution.

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To find the value of L when the supply (s) is equal to 20, we can use the given supply curve equation: S = 4L + 8.
The supply curve equation represents how much labor (L) will be supplied at a given wage rate (s). In this case, the equation tells us that the supply of labor is equal to 4 times the quantity of labor (L) plus 8.
To find L when s = 20, let's substitute s = 20 into the equation:
20 = 4L + 8
Next, let's isolate L by subtracting 8 from both sides of the equation:
20 - 8 = 4L
Simplifying further:
12 = 4L
Now, we need to solve for L. We can do this by dividing both sides of the equation by 4:
12/4 = 4L/4
Simplifying again:
3 = L
Therefore, when the supply (s) is equal to 20, the value of L is 3.
So the correct answer is 3.

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Labour is by far the most common of the factors used in measuring productivity. One reason for this is, of course, the relatively large share of labour costs in the value of most products.

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The law of supply states that, other things being constant, as price increases, the quantity supplied also increases. Basically, when the price of a good or service goes up, suppliers have an incentive to produce and sell more of that item. This is because they can earn more profit by selling at the higher price. So, as the price rises, suppliers are motivated to increase their production and offer more of the product to the market. On the other hand, when the price of a good or service decreases, suppliers have less motivation to produce and sell it. This is because they can earn less profit or even incur losses at the lower price. As a result, they will reduce the quantity supplied. In summary, the law of supply tells us that there is a direct relationship between price and quantity supplied. When the price increases, suppliers respond by increasing the quantity they are willing to supply to the market. Conversely, when the price decreases, the quantity supplied decreases.

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- Monetary policy is implemented by reducing the interest rates in the economy in order to increase the supply of money to enhance growth.

- The fiscal policy is implemented by the reduction of taxes and increasing government spending in order to boost demand.

- Policymakers may choose to implement a stabilization policy to close the recessionary gap and increase real GDP.

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The diagram above represent a monopolist diagram.

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The loans help to create poverty, as capital that could have been invested instead was channeled into debt repayment.

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To calculate the equilibrium level of national income (Y), we start with the equation Y = C + I + G. In this equation, C represents consumption spending, I represents investment spending, and G represents government spending. Now, let's substitute the given values into the equation: C = 100 + 0.75Y I = 50 G = 200 Substituting these values, we get: Y = (100 + 0.75Y) + 50 + 200 To solve for Y, we need to simplify the equation: Y = 100 + 0.75Y + 50 + 200 Combining like terms, we have: Y = 350 + 0.75Y Next, we can solve for Y by isolating it on one side of the equation. To do this, we can subtract 0.75Y from both sides: Y - 0.75Y = 350 Simplifying further, we have: 0.25Y = 350 Finally, we can solve for Y by dividing both sides of the equation by 0.25: Y = 350 / 0.25 Calculating this, we find: Y = 1400 So, the equilibrium level of national income (Y) is 1400.

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Velocity of money is the total amount of money in circulation in an economy. It is calculated as Velocity of money = GDP/Money Supply

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The economies of West African countries primarily depend on primary products.
Primary products refer to raw materials or natural resources that are extracted directly from the earth or sea. These resources typically include agricultural products such as crops, livestock, and fisheries, as well as minerals and natural resources like oil, gas, and minerals.
West African countries, like many developing nations, tend to have economies that are heavily reliant on these primary products. This reliance is due to a combination of factors such as the abundance of natural resources in the region and historical patterns of economic development.
Agriculture plays a significant role in the economies of West African countries, with a large percentage of the population engaged in farming activities. These countries export a variety of agricultural products, including cocoa, coffee, palm oil, cotton, and timber. These exports generate significant revenue and contribute to the overall economic growth of these nations.
Additionally, West Africa is rich in mineral resources such as gold, diamonds, bauxite, and iron ore. The extraction and export of these minerals also contribute to the economic development of these countries.
While some West African countries have started to diversify their economies and develop secondary and tertiary sectors, the primary sector remains a vital component of their economies. However, it is important for these countries to also focus on diversification and value addition to their primary products to reduce their vulnerability to fluctuations in global commodity prices and achieve sustainable growth.

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The economic problem occurs when there is scarcity relative to demand. Scarcity means that resources are limited, while demand refers to people's desires and needs for goods and services. In simple terms, the economic problem arises when there are not enough resources to satisfy everyone's wants and needs. This is because resources, such as land, labor, and capital, are finite, while people's desires are infinite. For example, imagine a small community with a limited amount of food available. If everyone in the community wants to eat, but there is not enough food for everyone, it creates an economic problem. This scarcity can lead to competition, as individuals and businesses try to obtain the limited resources. The economic problem is not caused by raw materials being imported or people being out of work. These factors can contribute to a country's economic challenges, but they are not the direct cause of the economic problem. Similarly, the absence of buyers for goods is a symptom of the economic problem, rather than the cause. If people cannot afford or do not want to buy goods, it indicates a mismatch between supply and demand. However, this does not explain why the economic problem exists in the first place. In summary, the economic problem occurs when there is scarcity relative to demand, meaning there are not enough resources to fulfill everyone's wants and needs. This scarcity leads to competition and the need for individuals and businesses to make choices regarding resource allocation.

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Macroeconomics focuses on the units of an economy in an aggregative manner, meaning it looks at the economy as a whole rather than focusing on individual units. This helps us understand how different parts of the economy interact and influence each other.
The correct option is **household, firms, government, corporate sector, and external sector**. Macroeconomics analyzes the behavior and interactions of these units to understand the overall performance of the economy.
1. **Households**: These are the individual consumers who make up the economy. They play a vital role in determining the consumption and saving patterns that influence economic activities.
2. **Firms**: Firms are the businesses that produce goods and services in the economy. Macroeconomics looks at their investment decisions, production levels, and employment to understand the overall economic growth and productivity.
3. **Government**: The government plays a significant role in macroeconomics. It collects taxes, provides public goods and services, regulates the economy, and influences economic policies such as fiscal and monetary measures to stabilize the economy.

4. **External sector**: The external sector represents international trade and the flow of goods, services, and capital across borders. Macroeconomics considers factors like exports, imports, exchange rates, and foreign investment to understand the impact of global interactions on the economy.
By examining these units in an aggregative manner, macroeconomics helps us understand how changes in one sector affect the others and ultimately impact the overall performance of the economy.

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If commodities X and Y are substitutes, the cross elasticity of demand between them will be positive.
Cross elasticity of demand measures how the quantity demanded of one commodity changes in response to a change in the price of another commodity. When two commodities are substitutes, they serve similar purposes and are considered as alternatives to each other. For example, if the price of commodity X increases, some consumers may switch to commodity Y as a substitute, causing an increase in the quantity demanded of commodity Y.
The positive cross elasticity of demand reflects this relationship. It means that an increase in the price of commodity X will lead to an increase in the demand for commodity Y, and vice versa. On the other hand, if the cross elasticity of demand were negative, it would indicate that the two commodities are complements, meaning that they are used together and a change in the price of one would result in an opposite change in the demand for the other.
Therefore, in the case of substitute commodities, the cross elasticity of demand will be positive.

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The causes of overpopulation are: falling mortality rate, underutilized contraception, lack of female education etc.

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The dotted line in the graph above represent the upturn and downturn of the econonmy. Therefore, the diagram is cyclical unemployment.

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A perfect market is a theoretical concept that represents an idealized scenario where certain conditions are met. In this market, there is an equilibrium between supply and demand, and no single buyer or seller has the power to influence prices. In order for a perfect market to exist, there are several conditions that need to be met. These conditions include: - **Lack of homogeneity of goods**: In a perfect market, goods are assumed to be identical and indistinguishable from one another. This means that there are no variations in quality, features, or brand identity. Buyers are indifferent to which seller they purchase from since the goods are the same. - **Perfect knowledge**: Another crucial condition is that all buyers and sellers in the market have access to complete and accurate information. This means they know the current market prices, availability of goods, and all relevant factors influencing the buying and selling decisions. No hidden or asymmetric information exists that could give an advantage to any market participant. - **Large buyers and sellers**: A perfect market assumes that there are a significant number of buyers and sellers in the market. This ensures that no single buyer or seller has enough market power to influence prices or control the market conditions. Each participant is a price taker, meaning they accept the prevailing market price and cannot change it on their own. - **Portability of goods**: The final condition for a perfect market is the ease with which goods can be transported from one place to another. This means that there are no significant barriers to trade, such as transportation costs, tariffs, or restrictions. Goods can freely move between buyers and sellers, allowing for efficient market operations. Now, looking at the given options, we need to identify the one that does NOT describe a condition necessary for the existence of a perfect market. And that would be **"lack of homogeneity of goods"**. In a perfect market, goods are assumed to be identical and indistinguishable. This means that there are no variations in quality or features. Homogeneity is a vital characteristic of a perfect market, so the lack of it would hinder the existence of a perfect market. In summary, the conditions required for a perfect market are: perfect knowledge, large buyers and sellers, and portability of goods. While homogeneity of goods is a necessary condition for a perfect market, it is not described in the options as a condition necessary for the existence of a perfect market.

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Economic agents are entities that make economic decisions. They include households, firms, and the government. The Central Bank, while an important institution, is not considered an economic agent as it does not make decisions about what, how, and for whom to produce. It is responsible for monetary policy and regulating the financial system.

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A multiplier is a factor of proportionality that measures how much an endogenous variable changes in response to a change in some exogenous variable such as investment, consumption, government expediture etc.

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An industry is a group of firms producing similar products and under separate administration or management.

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The part of income after tax that is not consumed is defined as saving. Saving refers to the portion of income that is not spent on immediate consumption and is instead put aside for future use.
When we receive our income, we typically have various expenses to cover, such as bills, groceries, and entertainment. After deducting these expenses and taxes, we are left with a certain amount of money. If we choose not to spend this remaining amount and instead keep it for later, we are saving that money.
Saving is important because it allows us to build up financial security and prepare for unexpected expenses or future goals. It can also be used for long-term investments, such as buying a house or planning for retirement.
In summary, saving is the part of our income that we choose to set aside rather than using it immediately for consumption.

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The correct answer is labour productivity.
Labour productivity refers to the rate at which output is produced by a worker or a group of workers in a given amount of time. It measures how efficiently and effectively workers are using their skills, time, and resources to produce goods or services.
To understand this concept, let's imagine a scenario where we have two workers producing bicycles. Worker A is able to produce 5 complete bicycles in one hour, while Worker B can only produce 3 complete bicycles in the same amount of time.
In this case, Worker A has a higher labour productivity because they are able to produce more output (bicycles) per unit of time (one hour) compared to Worker B.
Labour productivity is an essential measure for companies and economies because it directly impacts their profitability and competitiveness. Higher labour productivity means that more goods or services can be produced using the same amount of resources or in less time. This leads to lower costs per unit and can result in higher profits or the ability to lower prices for customers.
In summary, labour productivity is a measure of how efficiently workers are producing goods or services and is calculated by dividing the total output by the number of workers or the amount of time it took to produce that output.

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The age group that belongs to the active labor force is the **18 - 64 years** category. This age range is generally considered to be the working-age population, as it encompasses individuals who are old enough to work and have not yet reached the age of retirement. People in this age group are typically in their prime working years, where they have the physical ability and the necessary skills and knowledge to actively participate in the labor market. They are often seeking employment, working in various industries or sectors, and contributing to the economic growth and development of their country. It is important to note that the specific age range considered as the working-age population may vary slightly across different countries or regions. However, in most cases, it generally falls within the **18 - 64 years** age bracket. On the other hand, the other age groups mentioned in the options are not typically considered as part of the active labor force: - The **0 - 17 years** age group consists of individuals who are below the legal working age and are typically attending school or dependent on others for their livelihood. - The **15 - 25 years** age group partially overlaps with the working-age population, but it includes individuals who may still be in school or pursuing higher education. While some individuals within this age range may be actively seeking employment or working part-time, they are generally not considered as the core active labor force. - The **65 years and above** age group represents individuals who have reached the retirement age or are eligible for retirement benefits. While some individuals in this age range may continue to work, either out of choice or due to financial circumstances, they are not considered as the primary active labor force. In summary, the **18 - 64 years** age group is the one that belongs to the active labor force, consisting of individuals who are in their prime working years and actively participating in the labor market.

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Private goods are referred to as rivalrous and excludable by economists. Let me explain what this means in a simple and comprehensive way.
When a good is rivalrous, it means that one person's use or consumption of the good diminishes its availability for others. For example, if you eat an orange, there is now one less orange for someone else to consume. The consumption of the orange by one person reduces the availability of the orange for others.
On the other hand, when a good is excludable, it means that it is possible to prevent someone from using or consuming that good if they do not pay for it. For instance, if you go to a movie theater and buy a ticket, you are allowed entry to watch the movie. However, if you do not buy a ticket, you will be excluded from watching the movie.
Private goods possess both of these characteristics. They are rivalrous because one person's use or consumption of the good reduces its availability for others. For example, if you buy a car, only you can use it at any given time, and someone else cannot simultaneously use it. Private goods are also excludable because it is possible to prevent others from using or consuming the good if they do not pay for it. For instance, if you purchase a book, you have exclusive access to read it unless you choose to share it with someone.
In summary, private goods are referred to as rivalrous and excludable because their consumption diminishes their availability for others, and it is possible to exclude others from using or consuming them if they do not pay for them.