JAMB UTME - Economics - 2023

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The Marginal Utility is the additional satisfaction a consumer gains from consuming one more unit of a good or service. It can be calculated by subtracting the total utility of the previous consumption from the total utility of the current consumption. In this case, the total utility of consuming 2 oranges is 16 and the total utility of consuming 1 orange is 9. Therefore, the marginal utility (X) of the second orange is 16 - 9 = 7.

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When a generalization is made based on observed facts, it is called inductive reasoning. Inductive reasoning involves drawing conclusions from specific instances or examples to come up with a general statement or theory. This means that we observe a pattern or trend from the evidence we have and then make a generalization or inference based on that pattern. Inductive reasoning is different from deductive reasoning, which involves starting with a general statement or theory and then using it to predict or explain specific instances. In inductive reasoning, we start with specific observations and use them to make a broader generalization. It is important to note that while inductive reasoning can often lead to accurate conclusions, it is not always guaranteed to be correct. However, it is a common and useful method used in many fields such as science, sociology, and psychology.

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The diagram above represent a monopolist diagram.

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Cost push inflation occurs when overall prices increase(inflation) due to increases in the cost of wages and raw materials. It can also occur when higher costs of production decrease the aggregate supply in the economy.

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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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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 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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The type of economy that exists in these countries is Mixed economy.

A mixed economy is an economic system that combines elements of both market and planned economies. It includes both private and public sectors, and the government plays a significant role in regulating and defining the structure of the economy.

In the given scenario, the fact that the countries have different levels of public expenditure as a percentage of GDP indicates that the government plays a role in the economy and is involved in spending a portion of the national income.

While the exact percentage of public expenditure varies between the countries, the presence of any public expenditure suggests government intervention and regulation in the economy. This means that these countries have a mixed economy, where both public and private sectors coexist and contribute to economic activities.

The government's involvement can take various forms, such as funding public goods and services, implementing social programs, and regulating industries. The level of government intervention may vary, but the presence of public expenditure indicates that the government has an active role in shaping the economy.

Therefore, based on the information provided, it can be concluded that the countries mentioned in the table have a mixed economy.

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An example of expansionary monetary policy by the Central Bank of Nigeria is "buying Treasury securities from commercial banks." Expansionary monetary policy is a type of policy implemented by the central bank to stimulate economic growth and increase the supply of money in the economy. This policy is typically used during times of economic downturn or recession to encourage spending and investment. When the Central Bank of Nigeria buys Treasury securities from commercial banks, it injects money into the economy. This increases the amount of money available in the banking system, making it easier for banks to lend to businesses and individuals. By increasing the money supply, the central bank aims to lower interest rates, which in turn encourages borrowing and spending. Lower interest rates mean that businesses and individuals can access credit more easily, leading to increased investment, consumer spending, and economic growth. This expansionary policy can help support economic activity, boost employment, and stimulate overall economic recovery.

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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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An example of a free good is water in the ocean.

A free good is a good that is available in unlimited supply and does not require any payment or exchange to obtain it.

In the case of water in the ocean, it is freely available and accessible to anyone. It is not owned by anyone and does not require any payment to access or use it. Therefore, it can be considered a free good.

On the other hand, free education, dinner you did not pay for, and your rented apartment are not examples of free goods.

Free education typically refers to education that is provided without direct payment by the student. While it may be free for the student, someone is still paying for it, such as the government or private institutions.

A dinner that you did not pay for may seem free to you, but someone, such as a friend or a host, is still paying for it. The cost of that dinner is borne by someone else, even if it is not you.

Similarly, a rented apartment is not a free good because it involves a transaction where you pay for the use of the apartment. You enter into a contractual agreement with the landlord and pay rent in exchange for living in the apartment.

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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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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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In a two by two model of international trade, it is assumed that **both countries could gain from trade at the same time, but the volume of the gains depends on terms of trade**. This means that both countries can benefit from engaging in trade with each other. Trade allows both countries to specialize in producing and exporting the goods in which they have a comparative advantage, while importing goods that they are less efficient at producing. This leads to increased efficiency and overall economic gains for both countries. However, the volume of the gains from trade depends on the terms of trade between the two countries. The terms of trade refer to the ratio at which the countries exchange their goods. If one country has a higher bargaining power or can produce goods at a lower cost, they may negotiate more favorable terms of trade, leading to a larger volume of gains for that country. On the other hand, if the terms of trade are less favorable, the volume of gains for both countries may be smaller. In summary, while both countries can benefit from trade, the extent of the gains will vary depending on the terms of trade negotiated between them.

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Investment multiplier (K) is a function of two factors; The MPS and MPC. If MPC is high, K will also be high but if MPC is low, K will also be low. on the other hand, If MPS is high, K will be low and if MPS is low, K will be high ( since there is an inverse relationship between MPS and K).

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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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One of the major problem of West African state is the relation of West African states with the colonial masters.

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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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Economics is often described as a science because it uses scientific methods to explain observed phenomena. Just like other scientific fields, economics relies on gathering data, formulating hypotheses, and conducting experiments to test these hypotheses. However, unlike fields such as physics or chemistry, economics does not rely on laboratory experiments or controlled experiments. Instead, economists analyze real-world data to understand how individuals, businesses, and governments make choices and interact with each other. They use statistical methods to analyze this data and make predictions about how changes in various factors will affect economic outcomes. While it is difficult to accurately predict the behavior of individual human beings, economics aims to make accurate predictions on aggregate behavior, or how groups of people will respond to changes in factors such as prices, taxes, or policies. These predictions are based on the analysis of historical data and the use of economic models, which simplify complex economic interactions. In summary, economics is considered a science because it employs scientific methods to explain observed phenomena, although it does not rely on laboratory experiments or controlled experiments. It uses data analysis, hypothesis testing, and economic models to understand and predict how individuals and groups make economic decisions and interact with each other.

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Mono- product economy ( an economy that produces one product or commodity) is not a characteristics of developing country. The characteristics are: high level of illiteracy, dependence on agriculture, low savings and investment, low standard of living, population explosion, high death rate etc.

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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 decision to consume more of one product under normal circumstances will **result in less consumption of another product**. When we have a limited amount of resources, we can only allocate them in certain ways. This is true for both individuals and businesses. If we choose to consume more of one product, it means we are using some of our resources to produce more of that product. As a result, we have less resources available to produce or consume other products. Let's take an example to understand this concept better. Suppose you have $10 to spend on food, and you can either choose to buy more fruits or more vegetables. If you decide to buy more fruits, it means you are allocating more of your budget towards fruits. As a result, you will have less money left to buy vegetables. On the other hand, if you decide to buy more vegetables, it means you are allocating more of your budget towards vegetables, and you will have less money left to buy fruits. Similarly, in a market economy, if consumers decide to buy more of one product (like smartphones), the demand for that product increases. This leads to an increase in production and consumption of smartphones. However, the resources used to produce smartphones are limited. Therefore, the production of other products (like laptops or tablets) may decrease because fewer resources are available to produce them. In conclusion, when the decision is made to consume more of one product, it generally means that less of another product will be consumed. This is because resources are limited and need to be allocated among different options.

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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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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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The quantity of a commodity that a consumer is willing and able to buy at a particular time is called demand.
Demand refers to the consumer's desire or willingness to purchase a specific product or service at a given price and at a given time. It represents the customer's intent to buy and the amount they are willing to buy at various price levels.
It is important to note that demand is not just about the desire for a particular item, but also the consumer's ability to pay for it. For example, someone may wish or desire to buy a luxury car, but if they do not have the financial means to afford it, their demand for that car is limited.
In summary, demand is the quantity of a commodity that a consumer is both willing and able to buy at a given time, reflecting their desire for the product and their ability to pay for it.

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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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Normative economics is a perspective on economics that reflects normative, or ideologically prescriptive judgments toward economic development, investment projects, statements, and scenarios. It expresses ideological judgments about what may results in economic activity if public policy changes are made.

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An indicator of underdevelopment is low per capita income. Per capita income refers to the average income earned by individuals in a country. In underdeveloped countries, the per capita income is generally low, meaning that people have lower incomes on average compared to developed countries.
Low per capita income is a significant indicator of underdevelopment because it directly affects the standard of living of people within a country. With low income, individuals have limited purchasing power, making it difficult for them to afford basic necessities such as food, clothing, and shelter. This can lead to overall poor living conditions and a lack of access to essential services like healthcare and education.
Additionally, low per capita income also implies limited economic opportunities and a weak economy. It suggests that the country's productivity and industrial development are low, leading to low wages and limited job opportunities. This can result in high levels of poverty and unemployment, further hindering the country's development.
In summary, low per capita income is a crucial indicator of underdevelopment because it reflects the overall economic situation of a country and directly impacts the living conditions and opportunities available to its citizens.

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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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The short run can be defined as the period of time during which at least one of the firm's inputs is fixed. In other words, it is a time frame in which the firm cannot easily or quickly adjust all of its inputs. This means that some resources, such as the size of a factory or the number of employees, cannot be changed in the short run.
During the short run, firms can only adjust their production levels by varying the amount of variable inputs, such as raw materials or utilities. The fixed input, which remains constant in this period, imposes limitations on the firm's ability to increase or decrease its output. This constraint on adjusting all inputs is what distinguishes the short run from the long run, where all inputs can be varied.
It is important to note that the length of the short run can vary depending on the industry and the specific circumstances of the firm. For some businesses, the short run may be a few months, while for others it could be several years. However, what remains consistent is that during the short run, the firm is restricted in its ability to modify certain inputs, which can impact its production and overall performance.

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

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

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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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Real cost is the cost of producing a good or service, including the cost of all resources used and the cost of not employing those resources in alternative uses.

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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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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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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.