WAEC SSCE - Economics - 2002

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The function of the Central Bank of Nigeria (CBN) as a "banker's bank" means that it provides banking services to other banks and financial institutions in the country. This includes maintaining their accounts, providing loans and advances, and facilitating transactions between them. By acting as a banker's bank, the CBN helps to ensure the stability of the banking system in Nigeria. It also plays a key role in setting monetary policy, which involves controlling the money supply and interest rates to achieve macroeconomic objectives such as price stability, economic growth, and employment. Therefore, the correct option from the given list is "serving as banker's bank."

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Subsistence production refers to the production of goods and services for the purpose of consumption by the producer and their household, rather than for sale to others or for the market. In other words, the focus is on producing what is necessary for one's own survival and needs, rather than for profit or exchange with others. Examples of subsistence production include growing vegetables in a home garden for personal consumption or making clothes at home for one's own use.

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The cost which a firm has to incur regardless of whether it produces any output or not, is called a fixed cost. Fixed costs are expenses that are not dependent on the level of production and must be paid even if there is no activity. These costs include things like rent, salaries, and property taxes. For example, consider a factory that produces bicycles. It has to pay a fixed rent of $10,000 per month, regardless of whether it produces 100 bicycles or none at all. This is a fixed cost that the factory has to pay every month. In contrast, variable costs are expenses that vary with the level of production, such as raw materials or labor. For example, the cost of steel needed to manufacture bicycles is a variable cost. The more bicycles the factory produces, the more steel it will need, and the higher the variable cost will be. Understanding the difference between fixed and variable costs is important for businesses because it can help them make better decisions about pricing, production levels, and profitability.

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Cheques are not money because they are not generally acceptable as a medium of exchange. While cheques can be used to transfer money from one account to another, they are not as widely accepted as physical currency. Not all businesses or individuals accept cheques, and they may be subject to verification and clearance procedures that can take several days. Money, on the other hand, is generally accepted as a medium of exchange and is widely recognized and valued within a given economy.

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The location of timber and plywood industries in West Africa is mainly influenced by the availability of raw materials. This is because the production of timber and plywood requires a large supply of wood, and West Africa is home to vast forests and timber reserves. The location of these industries is therefore determined by the proximity of these forests and reserves to the factories. Additionally, the availability of raw materials can also affect the cost of production, making it more cost-effective to locate the factories closer to the sources of wood. While factors such as transport, water, and labor supply may also play a role in the location of these industries, the primary determinant is the availability of raw materials.

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One advantage of division of labor is the production of specialized goods. When tasks are divided and workers specialize in a particular task, they become more efficient at it, which can lead to higher productivity and higher quality output. This specialization allows for the production of goods that are specific to a particular market or customer demand. For example, in a car factory, one worker may specialize in assembling the engine while another specializes in installing the seats. This specialization can lead to the production of cars that are designed for specific purposes or customers, such as sports cars or family cars. Therefore, the advantage of division of labor is that it can lead to the production of goods that are tailored to meet specific needs and demands.

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The most frequent occurring value in a given data is called the mode. This means that when we have a set of data, we count how many times each value appears, and the mode is the value that appears most often. For example, in the set of data {1, 2, 2, 3, 4, 4, 4, 5}, the mode is 4, because it appears three times, which is more than any other value in the set.

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Economics can be best described as the study of how individuals, organizations, and societies make choices to allocate limited resources to satisfy their unlimited wants and needs. It covers a wide range of topics, including the production and consumption of goods and services, the distribution of income and wealth, the role of markets and government, and the behavior of individuals and institutions in the economy. In short, economics is concerned with understanding and improving the functioning of the economy as a whole.

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High per capita income is not likely to be an effect of a growing population. A growing population generally leads to a rise in demand for goods and services, which in turn creates more job opportunities. However, this increase in demand can lead to an increase in prices, resulting in a fall in the standard of living. Additionally, a growing population may also lead to increased competition for resources, which can lead to unemployment. Therefore, high per capita income is not likely to be an effect of a growing population.

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This type of demand is called a "competitive demand". Competitive demand occurs when two or more products or goods can be used as substitutes for each other. In the given scenario, butter and margarine are substitutes for each other. As the demand for butter increases, consumers are likely to switch to butter from margarine, which will decrease the demand for margarine. This shows how the demand for one product can affect the demand for another related product.

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International trade is based on the law of comparative cost advantage, which states that countries should specialize in producing and exporting goods that they can produce at a lower opportunity cost than other countries, and import goods that they cannot produce efficiently. In other words, countries should produce the goods that they can produce most efficiently, and trade with other countries to obtain goods that they cannot produce efficiently. By doing so, countries can increase their overall production and consumption, and ultimately improve their standard of living. The law of comparative cost advantage was developed by the economist David Ricardo, and is widely accepted as a key principle of international trade.

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Localization of industry refers to the concentration of the firms of an industry in a particular area. This is often due to factors such as the availability of raw materials, infrastructure, skilled labor, and government policies. Localization of industry has the advantage of creating economies of scale, reducing transportation costs, facilitating knowledge and technology sharing, and improving competition. It can also lead to the development of industrial clusters, which can foster innovation and productivity growth.

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A liability is an obligation or debt that a company owes to others. In the case of commercial banks, a liability refers to the money that the bank owes to its depositors and other creditors. This means that if someone deposits money in a bank, the bank is liable to return that money to the depositor on demand or as per the agreed terms. Out of the given options, the liability of commercial banks is "deposits" since it is the money that the bank owes to its customers who have deposited their money in the bank. Money at call, loans to customers, and overdrafts are assets of commercial banks since they represent the money that the bank has lent out to its customers.

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The inaccurate census figure of most countries in West Africa is because of the high degree of illiteracy. Illiteracy makes it difficult for people to understand the importance of participating in the census exercise. Some people may also be afraid to reveal their actual numbers due to suspicion or distrust of the government. As a result, census figures tend to be lower than the actual population, making it difficult for government planners to accurately allocate resources and plan for the future.

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In the case of a commodity with perfectly inelastic demand, consumers are willing to pay any price for it, so an increase in tax on this commodity will be passed entirely onto the consumer. Therefore, the incidence of the tax will be on the consumer.

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The problem with trade by barter is the difficulty in determining fair exchange rates for goods and services. Unlike in a monetary economy where the value of goods and services is determined by a common currency, in a barter system, the value of goods and services is subjective and can vary between traders. For example, a farmer may need a new plow and offer to trade some of his crops for it. However, the person with the plow may value the crops differently than the farmer, leading to a disagreement over the fair exchange rate. This can result in a breakdown in trade and limit the potential benefits of trade. In addition, barter systems may also suffer from issues such as hoarding and limited specialization. Without a common currency, individuals may hoard goods in anticipation of future needs, leading to inefficient allocation of resources. Also, without specialization, individuals may lack the expertise to produce certain goods or services, limiting the potential gains from trade. Overall, the problem with trade by barter is the difficulty in determining fair exchange rates, which can limit the potential benefits of trade and lead to inefficient allocation of resources.

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Interest is a reward to a factor of production. It is the payment made by a borrower of funds to the owner of the funds, usually in return for the use of those funds over a period of time. In the context of factors of production, interest is a reward to capital, which is one of the four factors of production (the others being land, labor, and entrepreneurship). When capital is used to produce goods and services, it earns interest as a reward for its contribution to the production process.

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Inflation refers to the increase in prices of goods and services over time. This can result in a decrease in the purchasing power of money. Out of the options given, debtors are the ones who can benefit from inflation. This is because inflation leads to a decrease in the value of money, which can effectively reduce the real value of debt. For instance, if a debtor took out a loan of $1000, with an interest rate of 5%, and there is a 3% inflation rate, then the real interest rate on the loan will be only 2%. Therefore, the debtor pays back the loan with money that is worth less than the money that was borrowed. On the other hand, savers and creditors are negatively affected by inflation because the real value of their savings and investments decrease as the purchasing power of money decreases. Pensioners who rely on fixed incomes and savings may also be negatively impacted by inflation if the cost of living increases faster than their income.

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The term "Gross Domestic Product (GDP)" refers to the total value of all goods and services produced within a country's borders in a given period of time. However, some factors of production, such as labor or capital, may be owned by foreigners. In such cases, the net factor income from abroad refers to the difference between the income earned by domestic factors of production in foreign countries and the income earned by foreign factors of production in the domestic country. By adding net factor income from abroad to GDP at market price, we get Gross National Product (GNP), which is the total value of all goods and services produced by a country's domestic factors of production, regardless of their location. Therefore, the correct option is "gross national product."

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When elasticity is zero, the demand curve is perfectly inelastic. Perfectly inelastic demand means that the quantity demanded does not change when the price changes. In other words, the demand is completely insensitive to price changes. This can occur when a good or service has no substitutes and is considered a necessity, such as life-saving drugs or medical treatments. For example, if a life-saving drug costs $100 per dose and the quantity demanded does not change, even if the price is increased to $1,000 per dose, then the demand is perfectly inelastic. The quantity demanded remains the same regardless of the change in price. When graphed, the demand curve for a perfectly inelastic good or service is a vertical line, because the price does not affect the quantity demanded. This means that the demand curve has zero slope and elasticity is equal to zero.

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Inflation can be controlled by increasing aggregate supply. Aggregate supply refers to the total amount of goods and services that producers are willing and able to supply in an economy. When aggregate supply increases, it leads to a decrease in prices, which reduces inflation. This is because as the supply of goods and services increases, there is less pressure on prices to rise due to increased competition among producers. Therefore, increasing aggregate supply is one of the ways that governments can control inflation.

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A socialist economy is an economic system in which the state owns and controls the means of production. This means that the government owns and operates businesses and industries, such as factories and farms, and manages the allocation of resources and distribution of goods and services. The goal of a socialist economy is to promote social welfare and eliminate economic inequalities, with the belief that collective ownership and control will lead to a more equal and fair society. In a socialist economy, there is typically little or no private ownership of property, and decisions about production and distribution are made by the government.

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When a nation's imports exceed its exports, its net export becomes negative. This means that the country is spending more on foreign goods and services than it is earning from its own exports. Essentially, a negative net export indicates that a country is importing more than it is exporting, leading to a deficit in its balance of trade. This deficit can have a negative impact on the country's economy, as it may result in a loss of jobs, reduced economic growth, and increased national debt.

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Large firms enjoy several benefits, such as economies of scale, brand recognition, and bargaining power. However, the extent of these benefits could be limited by the size of the market they operate in. A firm can only grow as much as the market allows, and if the market is small or saturated, the firm's potential for growth and profit will also be limited. Additionally, the growth of specialization and technological advancements may also limit a firm's ability to maintain its competitive advantage, as smaller firms may be more nimble and able to adapt to changing market conditions. Therefore, despite their size and advantages, large firms still face limitations that can affect their success in the long run.

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In East Africa, cooperative societies enjoy tax-free points. A cooperative society is a business organization that is owned and operated by a group of individuals for their mutual benefit. These societies are formed to provide goods and services to their members at affordable prices. The East African governments recognize the importance of these organizations in promoting economic growth and development, and therefore, they offer tax exemptions to encourage their establishment and operation. This tax exemption policy is aimed at promoting investment, job creation, and economic growth. Therefore, cooperative societies in East Africa enjoy tax-free points.

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Malthus population theory stated that the population may outgrow the means of subsistence. This means that if the population continues to grow at a faster rate than the food supply, people will eventually face a crisis of overpopulation and starvation. According to Malthus, this crisis would occur because population tends to increase geometrically while food supply increases only arithmetically. Therefore, Malthus argued that population growth should be controlled through measures such as late marriages and celibacy to avoid the catastrophe of overpopulation.

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A commodity is said to have derived demand when it is demanded because of what it can help to produce. In other words, the demand for the commodity is derived from the demand for other goods and services that it can contribute to producing. For example, the demand for steel may be derived from the demand for cars or buildings. This is different from a commodity with direct demand, which is demanded for immediate consumption or use.

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A deficit in the balance of payment occurs when a country's import expenditure exceeds its export earnings. To finance this deficit, a country can use various methods, including borrowing from foreign countries, selling assets to foreigners, and receiving foreign aid. These transactions fall under the capital account of the balance of payment. The capital account reflects the flows of funds between a country and its trading partners that are not related to trade in goods and services. Therefore, a deficit in the balance of payment is usually financed through the capital account.

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The correct statement about population is that under-population implies that available resources are not used to full capacity. Under-population occurs when the number of people in a particular area is lower than what is necessary to fully utilize the available resources, such as land, labor, and capital. As a result, there is excess capacity, and resources are not utilized to their full potential. For example, consider a small town with a population of 1,000 people and several factories. If the factories can employ up to 2,000 people, the town is underpopulated. In this case, the available labor force is not sufficient to fully utilize the factories' capacity. Therefore, the factories are not operating at their full potential, and the town is not benefiting from the maximum possible output. In contrast, over-population occurs when the number of people in a particular area exceeds the available resources, resulting in a decline in per capita output and standard of living. Optimum population, on the other hand, refers to the level of population that maximizes the use of available resources and results in sustainable economic growth and development. It is neither fixed nor does it lead to overcrowding of cities.

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One of the advantages of large scale production is that the firm can use labor-saving machinery. Large scale production means producing goods in large quantities, which requires a lot of labor. However, by using machinery to automate certain tasks, the amount of labor required can be reduced, which can result in cost savings for the firm. Machinery can also increase production efficiency and consistency, resulting in higher quality products at lower costs. This can give the firm a competitive advantage by allowing them to offer their products at a lower price than their competitors.

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Land is considered a factor of production because it is a natural resource that can be used to create goods and services. It is a free gift of nature that is not man-made, and as such, it is an important resource for economic development. Land can be used to grow crops, raise livestock, extract natural resources such as minerals and oil, build factories and homes, and provide recreational opportunities. Land ownership is important because it determines who has the right to use the land and who benefits from the economic activities that take place on it. Therefore, land plays an important role in the creation of utility and economic growth.

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Terms of trade refers to the rate at which a country's exports exchange for imports from another country. It is a measure of the relative value of a country's exports in comparison to its imports. If a country's terms of trade improve, it means that it can buy more imports with the same amount of exports. On the other hand, if a country's terms of trade deteriorate, it means that it has to export more to buy the same amount of imports. Therefore, terms of trade are an important economic indicator that affects a country's balance of payments, international trade, and economic growth.

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The main objective of setting up private businesses is to maximize profits. Private businesses are established and operated with the primary goal of generating profits for the owners or shareholders. The desire for profit maximization drives private businesses to undertake various activities, including research and development, marketing, and cost reduction measures, among others. This profit motive also encourages private businesses to innovate and invest in new technology and machinery, leading to economic growth and job creation.

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One of the criticisms of population increase is that it can result in an increase in government expenditure. As the population grows, the government needs to provide more services and infrastructure to meet the needs of the growing population, such as schools, hospitals, roads, and housing. These services and infrastructure require funding, which can lead to an increase in government expenditure. This can put pressure on the government's budget and may result in a need for higher taxes or government debt.

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Merchant banks are financial institutions that offer financial services and advice to businesses, corporations and governments. One of the functions of merchant banks is to act as acceptance houses. This means that they accept bills of exchange from their clients, which allows the clients to get immediate access to cash rather than waiting for the bills to mature. The merchant bank then holds onto the bills until they mature and collects the full amount owed. This service helps businesses to manage their cash flow and improve their liquidity. The other options are not functions of merchant banks.

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Warehouse facilities in the distribution and marketing of products are provided by wholesalers. Wholesalers are businesses that buy large quantities of products from manufacturers and sell them in smaller quantities to retailers or other businesses. They often provide warehousing facilities for the products they purchase, which allows them to store large quantities of goods until they are needed by retailers or other customers. By providing these warehousing facilities, wholesalers help to ensure that products are available to retailers when they need them, and they also help to reduce the cost of distribution by consolidating shipments and reducing transportation costs.

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A limited liability company is owned by the shareholders. This means that individuals or other companies can purchase shares of the company, which represents ownership in the company. Shareholders are entitled to a portion of the company's profits, and their liability is limited to the amount they have invested in the company. This means that if the company were to go bankrupt or be sued, the shareholders would not be personally responsible for the company's debts beyond the amount they invested.

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Opportunity cost is the value of the best alternative that is forgone when making a choice. In other words, when a consumer has to choose between two or more options, the opportunity cost is the value of the next best alternative that they are giving up. For example, if a consumer has $10 and has to choose between buying a book for $5 or buying a movie ticket for $8, the opportunity cost of buying the book is the value of the movie ticket that they could have bought instead. Understanding opportunity cost is important because it helps consumers to make better decisions. By considering the opportunity cost of each choice, consumers can make more informed decisions about how to allocate their limited resources, such as time or money. By choosing the option with the lowest opportunity cost, consumers can minimize their costs and maximize their satisfaction.

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Personal savings are generally low in West Africa because of the level of income of people. Many people in West Africa have low incomes, which makes it difficult for them to save money. In many cases, people's income is barely enough to cover their basic needs, such as food, housing, and healthcare. As a result, they have little or no money left over to save. In addition, many people in West Africa work in the informal sector, where they may not have access to formal banking services or other financial products that could help them save money. This can also make it difficult for people to save, even if they have some money left over after paying for basic expenses.

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A market equilibrium exists when the quantity of a good or service demanded by buyers is equal to the quantity supplied by sellers at a specific price. In other words, a market equilibrium is reached when the demand for a product is matched by the supply of that product, resulting in a stable price. At the equilibrium price, buyers are willing to purchase exactly the same quantity of the product that sellers are willing to sell. There is no excess demand or excess supply in the market. Buyers who are willing to pay the equilibrium price are able to purchase the product, and sellers who are willing to sell at that price are able to sell their product. When the price is above the equilibrium level, the quantity supplied exceeds the quantity demanded, resulting in a surplus. This surplus causes sellers to lower their prices to sell their excess supply, which eventually brings the market back to equilibrium. On the other hand, when the price is below the equilibrium level, the quantity demanded exceeds the quantity supplied, resulting in a shortage. This shortage causes buyers to bid up the price to obtain the product, which eventually brings the market back to equilibrium. Overall, a market equilibrium is a state of balance between supply and demand, where both buyers and sellers are able to trade at a mutually agreed upon price.

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The greatest revenue earning industry in Nigeria is oil and gas, which falls under the category of mining. Nigeria is one of the largest oil-producing countries in Africa and the world. The oil and gas industry has played a significant role in the country's economy, contributing a substantial percentage to the Gross Domestic Product (GDP) and serving as a major source of foreign exchange earnings. The industry also provides employment opportunities and is a major driver of infrastructural development in the country.

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As of my knowledge cut-off date of September 2021, the National Electric Power Authority (NEPA) in Nigeria was a public corporation established by the Nigerian government to oversee the generation, transmission, and distribution of electricity across the country. However, it is important to note that governmental organizations can undergo changes in their structure and classification over time.

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The value of money is best determined by its purchasing power. This means the amount of goods and services that can be purchased with a certain amount of money. The more purchasing power a currency has, the more valuable it is. Portability and being recognized are important factors in making a currency functional, but they do not directly determine its value. The size of a currency note is irrelevant to its value.

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Indigenous firms (locally owned businesses) in West Africa tend to remain small. Several factors limit their growth in size.

• Shortage of capital: local firms often lack the funds and access to long-term finance needed to expand, buy machinery or build large premises.
• Small size of the market: low incomes and a limited number of buyers mean firms cannot sell enough to justify large-scale production.
• Poor infrastructure: inadequate roads, electricity and water raise costs and make large-scale operation difficult.
• Lack of skilled and managerial manpower: shortage of trained managers and technicians makes it hard to run and control a big firm.
• Low level of technology: reliance on simple, outdated tools keeps output and firm size small.
• Limited managerial and organisational ability: many are family or one-person businesses whose owners cannot delegate or manage a large organisation.
• Fear of loss of control: owners may avoid taking in partners or shareholders because they wish to keep sole ownership.
• Nature of the product: goods needing personal or custom attention cannot easily be produced on a large scale.
• Competition from large and foreign firms: bigger, better-financed competitors restrict the growth of small local firms.
• Government policy and multiple taxation: heavy taxes, poor incentives and unstable policy discourage expansion.
• Poor access to raw materials: irregular or costly supply of inputs limits the scale of output.
• Lack of infrastructure for storage and distribution: limits how far and how much a firm can sell.

Because of these constraints, most indigenous firms stay small, and only a few grow into large-scale enterprises.

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(a) Fixed costs versus variable costs.

(b) When a firm will continue to operate at a loss in the short run. In the short run some costs are fixed and must be paid whether or not the firm produces. A firm should keep producing, even at a loss, as long as the price it receives at least covers its average variable cost. The reason is that by producing it earns revenue that covers all its variable costs and makes some contribution towards the unavoidable fixed costs; shutting down would still leave the whole of the fixed cost to be paid, so the loss would be larger.

The rule can be stated as:

• If \(P \geq AVC\): continue producing in the short run, because revenue covers variable cost and helps pay part of fixed cost.
• If \(P < AVC\): shut down, because each unit sold loses more than the fixed cost alone; producing makes the loss worse.

Worked illustration. Suppose fixed cost is \(N400\), and to produce 100 units the variable cost is \(N600\), so average variable cost is \(N6\) per unit. Total cost is \(N1000\), so average total cost is \(N10\) per unit.

• If the price is \(N8\): revenue \(= 100\times 8 = N800\). This is below total cost of \(N1000\), so there is a loss of \(N200\). But \(N8\) is above the \(N6\) average variable cost, so revenue covers the \(N600\) variable cost and contributes \(N200\) towards fixed cost. If the firm shut down it would lose the full \(N400\) fixed cost. Producing (loss \(N200\)) is better than shutting down (loss \(N400\)), so the firm continues.
• If the price fell to \(N5\): revenue \(= N500\), which does not even cover the \(N600\) variable cost. The firm should shut down, because producing would lose more than the \(N400\) fixed cost.

So a firm continues to operate at a loss in the short run only while price is at least equal to average variable cost. This is called the shut-down point: it lies at the minimum of the average variable cost curve.

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(a) Direct versus indirect taxes. A direct tax is a tax levied directly on the income or property of a person or organisation, where the person on whom it is imposed also bears the burden and pays it directly to the government. A indirect tax is a tax levied on goods and services, so that it is paid in the first place by producers or sellers but its burden can be shifted onto the final consumer through higher prices.

(b) Advantages of direct taxes:

• Equity (fairness): they can be made progressive, so that those with higher incomes pay a larger proportion, spreading the burden according to ability to pay.
• Certainty: the taxpayer knows how much to pay and when, and the government can estimate the revenue fairly accurately.
• Economical to collect: collection costs are relatively low because the tax is paid directly, often through employers.
• Elastic: revenue rises automatically as incomes rise, so the government's income grows with the economy.
• Reduces inequality: by taking more from the rich, it helps to narrow the gap between rich and poor.
• Does not directly raise prices: because it is not added to the price of goods, it does not by itself push up the cost of living.
• Civic awareness: since taxpayers feel the tax directly, it can make them more conscious of, and interested in, how public money is used.

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(a) A market economy (also called a free enterprise, capitalist or laissez-faire economy) is an economic system in which the basic questions of what to produce, how to produce, and for whom to produce are decided mainly by the price mechanism, that is, by the free interaction of demand and supply, with private individuals and firms owning the means of production and the government playing little or no direct part.

(b) Features of a market economy:

• Private ownership of the means of production: land, capital and firms are owned by private individuals, not the state.
• Freedom of choice and enterprise: people are free to own property, choose their occupation, set up businesses and decide what to buy.
• The profit motive: production is driven by the desire of private owners to make profit.
• The price mechanism (market forces): prices set by demand and supply guide what is produced, how, and for whom; they act as signals and allocate resources.
• Competition: many producers and consumers compete, which influences prices and efficiency.
• Consumer sovereignty: consumers, through their spending, largely determine what is produced.
• Limited government intervention: the government mainly provides law, order and defence, leaving most economic decisions to the market.
• Existence of inequality: incomes and wealth are distributed unequally, according to ownership of resources and success in the market.

In such a system, self-interest and the price mechanism coordinate the millions of separate decisions of buyers and sellers.

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The level of employment means the number of the working population actually engaged in productive work. It is influenced by several factors that affect the demand for and supply of labour, and the general state of the economy.

• Level of aggregate demand: when total spending on goods and services is high, firms produce more and employ more workers; low demand causes unemployment.
• Availability of capital and investment: more investment sets up more firms and projects, creating jobs; low investment limits employment.
• State of technology: labour-saving machines can raise output but may reduce the number of workers needed for a given output (technological unemployment).
• Availability of infrastructure: good roads, power and water encourage industries to set up and expand, raising employment.
• Size and skill of the labour force: the number of people willing and able to work, and whether their skills match the jobs available, affect how many can be employed.
• Government policy: fiscal and monetary policy, and programmes to create jobs, expand or contract employment.
• Level of industrialisation and diversification: a wider industrial base creates more and varied jobs.
• Availability of raw materials: steady supply of inputs keeps industries running and workers employed.
• Political stability and security: a stable, secure environment attracts investment and sustains employment.
• Wage levels: very high wages relative to productivity can discourage firms from hiring.
• Education and training: a well-trained workforce is more employable and attracts employers.
• Seasonal and structural factors: some jobs are seasonal, and shifts in the structure of the economy can create or destroy jobs.

In short, the level of employment depends mainly on the strength of demand in the economy and on the amount of investment, supported by adequate skills, infrastructure and stable government policy.

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The wage rate is the price paid for labour. Its level is influenced by several factors, working through the demand for and supply of labour, and through institutions such as trade unions and government.

• Demand for labour: where labour is greatly needed (high demand), wages tend to be high; where demand is low, wages are low. The demand for labour is a derived demand, depending on the demand for the goods the labour produces.
• Supply of labour: when workers with a particular skill are scarce, wages are high; when they are abundant, wages are low.
• Productivity of labour: more productive workers add more to output, so employers can and will pay them more.
• Level of skill, training and qualification: jobs requiring long training, rare skills or high qualifications command higher wages.
• Bargaining power of trade unions: strong unions can negotiate higher wages for their members.
• Government legislation: a legal minimum wage and other labour laws set a floor and influence pay.
• Cost of living: in areas or times of high living costs, wages tend to be higher to maintain real income.
• Nature of the work: dangerous, unpleasant or difficult jobs may carry higher wages to attract workers.
• Ability of the employer or industry to pay: profitable firms and industries can pay more than struggling ones.
• Mobility of labour: where workers can move easily to better-paid jobs, wages tend to equalise; immobility keeps some wages low.
• Length of training and responsibility: jobs with heavy responsibility or long preparation usually attract higher pay.
• Custom, discrimination and social factors: tradition and unequal treatment can affect the wages of certain groups.

In practice the wage in any job reflects the interaction of these forces, especially the balance between the demand for and the supply of that kind of labour.

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First find the equilibrium, where quantity supplied equals quantity demanded. Reading the table, at a price of \$2.00 per thousand kg both quantity supplied and quantity demanded equal 9 (000). So equilibrium price is \$2.00 and equilibrium quantity is 9,000 kg.

(a)(i) A fixed price of \$1.50 is below equilibrium, so it creates excess demand:

\[ \text{Excess demand} = Q_d - Q_s = 14 - 6 = 8\;(000) = 8{,}000\text{ kg} \]

(a)(ii) If the government fails to enforce the \$1.50 ceiling, the shortage will drive the price up until it returns to the equilibrium price of \$2.00, where the shortage disappears.

(b) A fixed price of \$3.00 is above equilibrium, creating a surplus of \( 16 - 3 = 13\;(000) \) kg. To maintain it the government must mop up the surplus, that is buy the 13,000 kg of excess maize (buffer-stock purchase) so that the extra supply does not force the price down.

(c) A fixed price of \$1.00 is below the equilibrium of \$2.00. Compared with equilibrium, quantity demanded rises from 9 to 19 (000) while quantity supplied falls from 9 to 3 (000). This produces a shortage of \( 19 - 3 = 16{,}000 \) kg of maize.

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Economic integration is an arrangement in which two or more countries agree to reduce or remove trade and other economic barriers among themselves and to cooperate economically, as in a free trade area, customs union, common market or economic community (for example ECOWAS in West Africa). Member countries can benefit in the following ways.

• Larger market: the combined market of member states is bigger, allowing firms to sell more and to produce on a large scale (economies of scale) at lower cost.
• Free movement of goods, labour and capital: removal of barriers lets goods, workers and capital move freely to where they are most needed and best rewarded.
• Increased trade among members: lower or zero tariffs encourage members to trade more with one another.
• Specialisation and better use of resources: each country can specialise in what it produces best, raising overall efficiency and output.
• Greater bargaining power: acting as a bloc, members can negotiate better terms with the rest of the world.
• Encouragement of industrialisation: the wider market and pooled resources make it worthwhile to set up large industries, sometimes jointly.
• Promotion of competition and lower prices: firms from different member states compete, improving quality and lowering prices for consumers.
• Transfer of technology and skills: cooperation spreads knowledge, technology and expertise among members.
• Joint infrastructure and projects: members can share the cost of large projects such as roads, power and communication links.
• Improved political relations and cooperation: closer economic ties promote peace, unity and cooperation among members.
• Employment opportunities: freer movement of labour and expanded industries create more jobs.

Through these gains, economic integration can raise output, incomes and living standards, and strengthen the members' position in the world economy.

Answer Details

Agricultural productivity means output per unit of input, such as output per farmer or per hectare of land. In Nigeria (and similar developing economies) agricultural productivity is low for a combination of the following reasons.

• Use of crude and simple tools: reliance on the hoe and cutlass, with little mechanisation, keeps output per worker low.
• Poor and outdated methods of farming: traditional methods such as shifting cultivation and bush burning limit yields.
• Illiteracy and lack of training: many farmers are uneducated and lack access to modern farming knowledge and extension services.
• Shortage of capital and credit: farmers cannot afford improved seeds, fertiliser, machinery or irrigation.
• Inadequate use of modern inputs: limited access to fertilisers, improved seeds, pesticides and improved breeds.
• Land tenure system: fragmented holdings and communal or inheritance-based land ownership discourage large-scale, efficient farming.
• Poor storage and processing facilities: much produce is lost after harvest, reducing effective output.
• Inadequate infrastructure: bad roads, poor transport and lack of rural electricity make it hard to reach farms and markets.
• Pests, diseases and unreliable rainfall: crop and livestock losses and dependence on rain-fed farming lower and destabilise yields.
• Poor soil and environmental problems: declining soil fertility, erosion and drought reduce output.
• Rural-urban migration: the movement of young, able-bodied people to towns leaves an ageing farm workforce.
• Low and unstable prices: poor and fluctuating returns discourage farmers from investing and expanding.
• Inadequate government support: weak or poorly implemented agricultural policies and services.

Because these problems reinforce one another, output per farmer stays low. Raising productivity requires mechanisation, education and extension, credit, improved inputs, better infrastructure, and stable, rewarding prices.

Answer Details

(a) A perfectly competitive market is a market structure in which there are very many buyers and sellers, each so small relative to the whole market that no single one can influence the market price. Every firm is a price taker: it accepts the price set by the interaction of total demand and total supply, and sells a homogeneous (identical) product.

(b) Conditions necessary for a perfectly competitive market:

• Large number of buyers and sellers: so many that each acts independently and no single buyer or seller can affect the market price.
• Homogeneous product: all firms sell an identical product, so buyers have no reason to prefer one seller over another.
• Free entry and exit: firms can enter the industry when profits are high and leave when they make losses, with no barriers.
• Perfect knowledge: buyers and sellers have full information about prices and products throughout the market, so the same good sells at one price.
• Perfect mobility of factors of production: resources can move freely to where they are best rewarded.
• No transport cost (and no product differentiation): so that a single uniform price rules in the whole market.
• No government or other interference: price is determined only by demand and supply, with no price control, taxes or subsidies distorting it.

Because of these conditions, a single ruling price prevails, each firm faces a perfectly elastic (horizontal) demand curve at that price, and firms can only decide how much to produce, not what price to charge. Perfect competition is largely a theoretical model; real markets rarely satisfy all the conditions, but it serves as a useful standard against which other market structures are judged.

Answer Details

A national debt is the total amount of money owed by the government of a country, made up of internal debt (owed to citizens and institutions at home) and external debt (owed to foreign lenders and institutions). A very large national debt can affect the economy in several ways, some harmful and a few beneficial.

Harmful effects:

• Heavy debt-servicing burden: large sums must be paid each year as interest and repayment, taking money that could have been used for development.
• Higher taxation: to service the debt, government may raise taxes, reducing people's disposable income and incentives.
• Reduced spending on essential services: debt repayment can crowd out spending on health, education and infrastructure.
• Balance of payments pressure (external debt): repaying foreign debt drains foreign exchange and can worsen the balance of payments.
• Loss of confidence and lower creditworthiness: a heavy debt can frighten off investors and make further borrowing harder and dearer.
• Inflation: if the government prints money or borrows heavily from the banking system to cover the debt, the money supply may rise and cause inflation.
• Crowding out of private investment: heavy government borrowing at home can raise interest rates and leave less credit for private firms.
• Loss of economic sovereignty: lenders such as the IMF may impose conditions that limit the government's freedom of action.
• Burden on future generations: external debt in particular passes the repayment burden to later generations.

Possible benefits (if the borrowed funds are well used):

• Borrowing can finance productive investment (roads, power, industries) that raises future output and incomes.
• Internal borrowing can mop up excess money and help control inflation.
• It allows the government to meet urgent needs without raising taxes sharply at once.

The overall effect therefore depends on the size of the debt relative to the economy and, above all, on how the borrowed money is used: debt that finances productive projects can help growth, while debt used for consumption becomes a heavy and unproductive burden.

Answer Details

(a)(i) The raw material is the intermediate input. It is a good produced by one firm and used up by another in further production, rather than being sold to a final user.

(a)(ii) Intermediate inputs are excluded (deducted) when national income is computed, so as to avoid double counting. Their value is already contained in the sales value of the finished goods.

(a)(iii) Gross Domestic Product by the value-added method: \( \text{Value added} = \text{Sales} - \text{Raw materials} \).

\[ \text{Firm A} = 200 - 100 = 100 \qquad \text{Firm B} = 400 - 60 = 340 \]

\[ GDP = 100 + 340 = \$440{,}000 \;(\$440\text{ thousand}) \]

(b)(i) Total depreciation of the country:

\[ 16 + 40 = \$56{,}000 \;(\$56\text{ thousand}) \]

(b)(ii) Net Domestic Product \( = GDP - \text{depreciation} \):

\[ NDP = 440 - 56 = \$384{,}000 \;(\$384\text{ thousand}) \]

As a check, GDP also equals the sum of incomes (labour costs + depreciation + profits): \( (80+16+4) + (160+40+140) = 100 + 340 = 440 \), confirming the value-added result.