JAMB UTME - Economics - 2023

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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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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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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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Currency depreciation is a fall in the value of a currency in a floating exchange rate system. Therefore, a decrease in the price of the domestic currency in terms of a foreign currency is referred to as depreciation.

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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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An increase in nominal income without an increase in prices will result in an **increased real income**. Nominal income refers to the amount of money a person earns or receives in a given period, without taking into account changes in prices. On the other hand, real income takes into consideration the effects of inflation by adjusting for changes in prices. When nominal income increases but prices remain constant, it means that the purchasing power of an individual's income has increased. In other words, they can afford to buy more goods and services with the same amount of money. This increase in purchasing power leads to an increase in real income. For example, let's say a person's nominal income is $1,000 per month, and the prices of goods and services they consume also remain constant. If their nominal income increases to $1,200 per month, without any increase in prices, they now have an additional $200 to spend on other things. This additional purchasing power translates to an increase in their real income. It is important to note that an increase in nominal income without an increase in prices does not necessarily lead to an **increased GDP** or a **decreased GNP**. GDP (Gross Domestic Product) measures the total value of goods and services produced within a country's borders, while GNP (Gross National Product) measures the total value of goods and services produced by a country's residents, including those produced abroad. The increase in real income of individuals does not automatically impact the overall production levels captured by GDP or GNP.

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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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The Gross Domestic Product is the total monetary or market value of all the goods and services produced within a country. It is used to measure the rate of growth in an economy.

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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 causes of balance of payment deficit are: low level of agriculture, low level of technological development, inadequacies in export promotion strategy, political instability, poor social and economic infrastructure, servicing of huge external debts, existence of import dependent industries etc.

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To calculate the elasticity of demand, we need to compare the changes in price and quantity demanded.
First, let's calculate the percentage change in price:
% change in price = ((new price - old price) / old price) x 100
% change in price = ((6 - 8) / 8) x 100
% change in price = (-2 / 8) x 100
% change in price = -25%
Next, let's calculate the percentage change in quantity demanded:
% change in quantity demanded = ((new quantity demanded - old quantity demanded) / old quantity demanded) x 100
% change in quantity demanded = ((30 - 20) / 20) x 100
% change in quantity demanded = (10 / 20) x 100
% change in quantity demanded = 50%
Now, let's calculate the elasticity of demand:
Elasticity of demand = % change in quantity demanded / % change in price
Elasticity of demand = 50% / -25%
Elasticity of demand = -2
The elasticity of demand is -2.
Explanation:
The negative sign in the elasticity of demand (-2) indicates that the demand for carrots is price elastic. This means that a decrease in price by 1% will lead to a more than proportionate increase in quantity demanded by 2%. In simpler terms, when the price of carrots decreased by 25%, the quantity demanded increased by 50%.
Therefore, the elasticity of demand is -2, which means that the demand for carrots is price elastic.

But since price elasticity is always represented with a positive number, the answer is 2

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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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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 maximum price is **P4**. To explain why, we need to understand that the prices are listed in ascending order. This means that **P1** is the lowest price and **P4** is the highest price. When we say "maximum price," we are referring to the highest possible price among the given options. In this case, **P4** is the highest price listed. Therefore, the maximum price is **P4**.

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The type of unemployment that occurs when an individual cannot find a job as a result of obsolete skills is known as Structural unemployment.

Structural unemployment happens when there is a mismatch between the skills that job seekers possess and the skills required for available jobs in the market. In this case, individuals may no longer be qualified for the jobs that are available due to changes in technology, market conditions, or shifts in the economy.

For example, let's say there is a rapid advancement in technology that makes certain job skills obsolete. Workers who had those skills may struggle to find employment because companies are now looking for individuals with more up-to-date skills.

This type of unemployment is different from cyclical unemployment, which is caused by fluctuations in the business cycle, or seasonal unemployment, which occurs due to seasonal variations in demand for certain jobs. Frictional unemployment, on the other hand, refers to the temporary unemployment that occurs when individuals are transitioning between jobs or entering the workforce for the first time.

To sum up, structural unemployment is the type of unemployment that arises when an individual cannot find a job because their skills are no longer in demand.

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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 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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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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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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The principle that specifies that the amount, when, and how to pay tax should be made known to the taxpayer is known as the Principle of Certainty. This principle ensures that taxpayers have a clear understanding of their tax obligations, which includes knowing the amount of tax they owe, the deadline for payment, and the method of payment.
The Principle of Certainty is important because it promotes transparency and accountability in the tax system. By providing clear and specific information to taxpayers, it enables them to accurately calculate and plan for their tax obligations. This helps to avoid confusion or misunderstandings between the taxpayer and the tax authorities.
Furthermore, the Principle of Certainty also ensures fairness and consistency in the tax system. By clearly stating the rules and requirements, it ensures that all taxpayers are treated equally and that there is no ambiguity or room for arbitrary decisions in the tax assessment process.
Overall, the Principle of Certainty provides a solid foundation for the relationship between taxpayers and tax authorities. It establishes clear expectations, promotes compliance, and adds credibility to the tax system.

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

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

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Part-time workers who desire full-time employment are classified as underemployed and contribute to the unemployment statistic.
Underemployment refers to a situation where individuals are working fewer hours than they would like or in jobs that do not utilize their skills and qualifications fully. In this case, part-time workers who desire full-time employment are considered underemployed because they are not able to secure the desired amount of work hours.
These underemployed workers contribute to the unemployment statistic because they are actively seeking additional work hours to meet their employment needs. They are considered part of the labor force because they are willing and available to work more hours, but they have not been able to find full-time employment.
It is important to note that not all underemployed workers contribute to the unemployment statistic. Some may choose to work part-time for personal reasons, such as family responsibilities or pursuing education. These individuals, although underemployed, are not actively seeking additional work hours and therefore do not contribute to the unemployment statistic.
However, in the case of individuals who are part-time workers and desire full-time employment, their underemployment status reflects the inadequacy of available job opportunities. They increase the count of unemployed individuals because they are willing and actively searching for additional work.
It is worth mentioning that cyclical unemployment is a different type of unemployment. It occurs when there is a downturn in the economy, causing a decrease in overall demand for goods and services, and subsequently, a decrease in the demand for labor. Cyclical unemployment is not directly related to the part-time workers' desire for full-time employment.

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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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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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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 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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Agriculture accounts for about 60% of the active labour force in West Africa. This is because a large portion of the population in West Africa is engaged in farming and other agricultural activities for their livelihood. The other options are incorrect as agriculture does not account for 60% of the arable land, service sector activities, or the commodity market in West Africa.

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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 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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When there is an increase in money income but the prices of goods and services remain the same, it will result in an outward shift in the budget line. To understand this, let's imagine a simple scenario where a person has a fixed amount of money to spend on different goods and services. This fixed amount of money represents their income. Now, if their income increases but the prices of goods and services they want to buy stay the same, they will have more money to spend. This means they can afford to buy more of each item. As a result, the budget line, which shows the different combinations of goods and services that can be bought with a given income, will shift outward. This indicates that they can now afford to buy a greater quantity of goods and services than before. Therefore, the correct answer is an "outward shift in the budget line" when there is an increase in money income with constant prices.

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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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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.

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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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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.