JAMB UTME - Economics - 2025

Detalles de la respuesta

Double counting is the error that leads to an overestimation of national income. It occurs when the value of a good is counted more than once as it passes through different stages of production.

For example, if a farmer sells wheat to a flour mill, the mill sells flour to a bakery, and the bakery sells bread to consumers, the value of the wheat is embedded in the flour price, which is in turn embedded in the bread price. If you add the sales value at every stage without subtracting intermediate inputs, you count the wheat's value three times, the milling value twice, and only the baking value once. The resulting total far exceeds the actual value of final goods produced, inflating the national income figure.

To avoid this, national income accountants use either the value-added method (counting only the value added at each stage) or count only the value of final goods and services.

Wrong timing of computation may shift income between periods but does not systematically inflate the total. Changes in prices within the year can distort comparisons between years but are handled by using constant prices. Incomplete statistical data would, if anything, lead to an underestimate because unrecorded economic activity is omitted from the count.

Detalles de la respuesta

Insurance companies perform several important functions in the economy, but collecting deposits from the public for investment is not one of them. This is a function of banks, not insurance companies.

The core functions of an insurance company include:

• Risk pooling and indemnification - collecting premiums from many policyholders and compensating those who suffer covered losses.
• Encouragement of savings habits through life assurance - life insurance policies serve as a form of saving, since the policyholder pays regular premiums and receives a lump sum at maturity or upon death.
• Mobilization of funds through premiums collected - the premiums received from policyholders form a large pool of funds that insurance companies invest in various assets.
• Granting of loans on a long-term basis for investment - insurance companies use their accumulated premium funds to provide long-term loans to individuals, businesses, and governments.

The key distinction is that insurance companies receive premiums (payments for risk coverage), while banks receive deposits (money entrusted for safekeeping and interest). Collecting deposits from the public is a banking function regulated under banking laws, not an insurance function.

Detalles de la respuesta

Cross elasticity of demand (XED) measures how the quantity demanded of one good responds to a change in the price of another good. The formula is:

\[\text{XED} = \frac{\% \text{ change in quantity demanded of Good B}}{\% \text{ change in price of Good A}}\]

In this question, a 20% rise in the price of Whisky leads to a 30% increase in quantity demanded of Schnapps. Substituting:

\[\text{XED} = \frac{30\%}{20\%} = \frac{30}{20} = 1.5\]

The cross elasticity of demand is 1.5.

The positive sign indicates that Whisky and Schnapps are substitute goods. When the price of one substitute rises, consumers switch to the other, increasing its quantity demanded. A value greater than 1 means the demand for Schnapps is relatively responsive to changes in the price of Whisky, confirming they are close substitutes.

Detalles de la respuesta

A monopoly is a market structure in which there is only one seller (or producer) of a product that has no close substitutes. Because the monopolist is the sole supplier, it has significant control over the price and output of the product. Consumers cannot switch to an alternative because no closely comparable product exists.

Key characteristics of a monopoly include:

• A single firm constitutes the entire industry.
• The product is unique with no close substitutes.
• There are high barriers to entry that prevent other firms from entering the market.
• The monopolist is a price maker, not a price taker.

The description of entry being restricted by a few firms in the market refers to an oligopoly, where a small number of large firms dominate. Two or more sellers selling differentiated products describes monopolistic competition. Few sellers selling at different prices also suggests an oligopolistic market. None of these match the defining feature of monopoly, which requires a single seller with a product that has no close substitute.

Detalles de la respuesta

The equilibrium price is the price at which the quantity demanded by consumers equals the quantity supplied by producers. At this price, there is no surplus (excess supply) and no shortage (excess demand), so the market "clears" - every unit offered for sale finds a buyer.

For this reason, another term for equilibrium price is the market clearing price.

Demand price refers to the maximum price a consumer is willing to pay for a given quantity, which is not the same as the equilibrium price unless it happens to coincide with the supply price. "Satisfactory price" is not a standard economic term. A price floor is a government-imposed minimum price set above the equilibrium to protect producers (as in minimum wage legislation or agricultural price supports), which is the opposite of the market-determined equilibrium.

In examinations, if you see "equilibrium price," "market clearing price," or "market price" used interchangeably, they all refer to the point where the demand and supply curves intersect.

Detalles de la respuesta

In the long run, all factors of production are variable, and a firm can change its scale of operation (plant size, workforce, equipment). A firm's average cost decreases in the long run because of increasing returns to scale, which is the source of economies of scale.

Increasing returns to scale means that when a firm increases all its inputs by a certain proportion, its output increases by a greater proportion. For example, if a firm doubles all its inputs and output more than doubles, the cost per unit of output falls. This happens because of advantages such as:

• Technical economies - larger machines and production lines operate more efficiently.
• Managerial economies - specialist managers can be employed for different functions.
• Purchasing economies - bulk buying of raw materials at discounted prices.
• Financial economies - larger firms can borrow at lower interest rates.

Decreasing marginal returns and diminishing average returns are short-run concepts related to adding more of one variable factor while others are fixed; they cause costs to rise, not fall. Decreasing average fixed cost is a short-run phenomenon (spreading fixed costs over more output) and does not explain the long-run decline in average cost, which requires a change in the scale of all inputs.

Detalles de la respuesta

OPEC stands for the Organization of the Petroleum Exporting Countries. It is an intergovernmental organisation founded in 1960 by five oil-producing nations (Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela). Its primary purpose is to coordinate and unify petroleum policies among member countries to ensure stable oil markets and a steady income for oil-producing nations.

The key word in the acronym is Petroleum, not "Petrol." Petroleum refers to crude oil and its derivatives in the broadest sense, encompassing all hydrocarbon resources extracted from the ground. "Petrol" is a narrower term referring specifically to refined motor fuel (gasoline), which does not capture the full scope of what OPEC member countries export.

The other options use incorrect expansions: "Oil and Petroleum Exporting Countries" begins with "Oil" rather than "Organization," and "Organic Petroleum Exporting Countries" substitutes a scientifically meaningless qualifier. Neither matches the established name of the organisation.

Nigeria joined OPEC in 1971 and is one of the key African member states of the organisation.

Detalles de la respuesta

Inflation is a sustained increase in the general price level. One of its key disadvantages is that fixed income earners lose.

People on fixed incomes, such as pensioners, civil servants on fixed salaries, and recipients of fixed-interest investments, receive the same nominal amount of money regardless of price changes. As prices rise during inflation, their money buys fewer goods and services, so their real income (purchasing power) declines. They become worse off even though their nominal income stays the same.

The statement that the standard of living rises is incorrect because inflation generally erodes living standards for most of the population, especially those who cannot negotiate higher wages quickly enough. Fixed income earners gaining is the opposite of what happens. Businessmen, in general, may actually benefit from inflation because the prices of their goods rise, and if they hold stocks of goods, the value of those stocks increases. They are typically among the groups that gain from inflation, not lose.

In examination questions on inflation, always distinguish between nominal values (the face value of money) and real values (what money can actually buy). Inflation reduces real values while nominal values may stay the same or even rise.

Detalles de la respuesta

The equation \( X = a + bY \) is a first-degree (linear) equation in two variables. It follows the standard form of a linear function, where \( a \) is the constant (the intercept on the X-axis when \( Y = 0 \)) and \( b \) is the coefficient that represents the slope - the rate at which \( X \) changes for each unit change in \( Y \).

The graph of any equation of the form \( X = a + bY \) is a straight line, making it linear. Key features of this graph:

• When \( Y = 0 \), \( X = a \), so the line crosses the X-axis at \( a \).
• The gradient (slope) of the line is \( b \).
• If \( b > 0 \), the line slopes upward; if \( b < 0 \), it slopes downward.

A quadratic function involves a squared term (e.g. \( X = aY^2 + bY + c \)) and produces a parabola. An exponential function has the variable in the exponent (e.g. \( X = a \cdot b^Y \)) and produces a curve that grows or decays rapidly. A cubic function involves a cubed term and produces an S-shaped curve. None of these forms match the given equation.

Detalles de la respuesta

Inflation can be classified by its cause into two main types: demand-pull inflation and cost-push inflation.

Cost-push inflation occurs when the general price level rises because of an increase in the cost of production. When it becomes more expensive for firms to produce goods and services - due to rising wages, higher raw material prices, increased energy costs, or higher taxes on producers - firms pass these increased costs on to consumers in the form of higher prices. The supply curve shifts to the left, meaning less output is supplied at every price level, and the overall price level rises.

A rise in demand for goods describes demand-pull inflation, not cost-push inflation. A decrease in the cost of production or a decrease in transportation cost would reduce production expenses and, if anything, lower prices rather than cause inflation.

Common triggers of cost-push inflation include oil price shocks, currency depreciation (which raises the cost of imported inputs), and wage increases that outpace productivity growth.

Detalles de la respuesta

Capitalism (also called a free market or free enterprise system) is an economic system in which the means of production are privately owned and economic decisions are driven by the profit motive and market forces. One of its key advantages is the efficient allocation of resources.

In a capitalist economy, resources are allocated through the price mechanism. Producers, motivated by profit, direct resources toward goods and services that consumers demand most. Competition among firms drives innovation, reduces waste, and pushes firms to produce at the lowest possible cost. Consumers signal their preferences through their spending decisions, and the market responds accordingly. This decentralised coordination tends to allocate resources more efficiently than central planning.

The other options either describe disadvantages or are inaccurate:

• Private initiative being discouraged contradicts capitalism's core principle - capitalism actively encourages private initiative and entrepreneurship.
• Job security is not assured in capitalism; workers can be hired and fired based on market conditions, which is often cited as a disadvantage.
• Consumer exploitation is a criticism of capitalism (through monopoly power or information asymmetry), not an advantage.

Detalles de la respuesta

In economics, land refers to all natural resources - the soil, minerals, water bodies, forests, climate, and everything provided by nature. On its own, land is passive; it cannot produce goods or services without intervention. Land as a factor of production is made useful through the application of human effort, which in economics is called labour.

Labour is the human physical and mental effort applied to natural resources to transform them into useful goods and services. Without human effort, fertile land would remain uncultivated, mineral deposits would stay underground, and rivers would not be harnessed for irrigation or power. It is the combination of land and labour that initiates the production process.

While fertilizer and machines can enhance the productivity of land, they are specific tools or inputs rather than the fundamental factor that makes land useful. Fertilizer is a material input, and machines represent capital (another factor of production), not the basic force that activates land. Acts of nature create land itself but do not make it productive in the economic sense - that requires deliberate human activity.

Detalles de la respuesta

In economics, land as a factor of production refers to all natural resources, including the physical surface of the earth, minerals, water bodies, forests, and the atmosphere. A key characteristic that distinguishes land from other factors of production is that its total supply is fixed.

Unlike labour, which can grow through population increase and training, or capital, which can be accumulated through investment, the total quantity of land available on the earth cannot be increased. No amount of demand or price increase can create more land. While specific parcels can be improved (e.g., through reclamation or irrigation), the aggregate supply of natural resources as a whole remains constant.

The supply of land does not vary meaningfully with time in economic terms. Saying it is higher in urban than rural areas confuses the density of human settlement with the actual supply of the factor of production. Likewise, the supply of land does not rise with demand, which is precisely what makes it unique among the factors of production and why economists describe its supply curve as perfectly inelastic (vertical).

Detalles de la respuesta

When commodity X and commodity Y are supplied jointly (produced together as a result of the same production process), an increase in demand for X will increase the supply of Y.

Joint supply means that producing one commodity automatically produces the other. Classic examples include beef and leather (both come from cattle) or petrol and kerosene (both come from refining crude oil). If demand for X rises, producers respond by increasing production of X. Because X and Y are produced together, any increase in the production of X inevitably produces more Y as well. The supply of Y therefore increases as a by-product.

The other statements are incorrect:

• "An increase in demand for Y will raise the price of X" - In fact, increased production of Y (to meet demand) brings more X onto the market as well, which tends to lower the price of X (increased supply of X pushes its price down), not raise it.
• "An increase in demand for X will cause less of Y to be produced" - The opposite is true. More X means more Y, not less, because they are produced together.
• "An increase in demand for X will leave the supply of Y unchanged" - This is also incorrect. The supply of Y will increase because producing more X necessarily produces more Y.

Detalles de la respuesta

Economic underdevelopment is characterized by a set of structural weaknesses that keep a country's standard of living low. Typical features include:

• Monocultural economy - heavy dependence on a single product or sector for export earnings, making the economy vulnerable to price fluctuations.
• Low life expectancy - poor healthcare, nutrition, and sanitation lead to shorter average lifespans.
• Income inequality - a wide gap between the rich and the poor, with wealth concentrated in the hands of a few.

High productivity, however, is a hallmark of economically developed countries. Developed nations achieve high output per worker through advanced technology, skilled labour, efficient management, and strong capital investment. Underdeveloped economies, by contrast, suffer from low productivity due to outdated technology, inadequate infrastructure, limited education, and poor capital formation.

Since high productivity is associated with development rather than underdevelopment, it is the feature that does not belong in the list of characteristics of economic underdevelopment.

Detalles de la respuesta

A banker's bank is an institution that provides banking services to other banks, just as commercial banks provide services to individuals and businesses. This role is performed by the Central Bank.

As the banker's bank, the Central Bank:

• Holds deposits (reserves) of commercial banks
• Provides clearing and settlement services for interbank transactions
• Lends to commercial banks, especially as a lender of last resort during liquidity crises
• Sets reserve requirements that commercial banks must maintain
• Supervises and regulates the operations of commercial banks

Commercial banks serve the general public, not other banks. Development banks provide long-term financing for specific sectors such as agriculture and industry. Mortgage banks specialize in providing loans for property purchases. None of these serve as the bank for other banks.

In Nigeria, for example, the Central Bank of Nigeria (CBN) performs this role for all commercial and merchant banks operating in the country.

Detalles de la respuesta

In developing (poorer) countries, the economy is typically dominated by the primary sector, of which agriculture is by far the largest component. A large percentage of the labour force is engaged in agriculture because:

• Agriculture is the most accessible economic activity, requiring relatively low capital investment and basic skills.
• Poorer countries often lack the infrastructure, technology, and capital needed for large-scale manufacturing or mining.
• Subsistence farming is the main source of livelihood for rural populations, which form the majority in developing nations.
• The industrial and service sectors are not sufficiently developed to absorb the available labour force.

As countries develop economically, the labour force gradually shifts from the primary sector (agriculture) to the secondary sector (manufacturing and industry) and then to the tertiary sector (services). This pattern of structural change is described by the Clark-Fisher model of economic development.

Manufacturing, trading, and mining are sectors that expand as a country industrialises, but in the poorest countries, it is agriculture that employs the largest share of workers.

Detalles de la respuesta

The location of industries is influenced by factors that make production efficient, profitable, and sustainable. Positive locational factors include nearness to the market (which reduces distribution costs), government influence in siting industries (through incentives, industrial estates, or infrastructure provision), and availability of infrastructural facilities such as roads, electricity, and water supply.

Political instability, on the other hand, discourages industrial location. When a country or region experiences frequent political upheaval, investors face risks such as destruction of property, policy reversals, disruption of supply chains, and loss of confidence in the business environment. No rational investor would deliberately locate a factory in an area prone to political violence or sudden changes in government policy that could confiscate assets or void contracts.

Therefore, political instability is the factor that does not encourage the location of industries.

Detalles de la respuesta

This question describes a condition from consumer equilibrium theory. When the last naira spent on each commodity yields equal marginal utility, the consumer has achieved the optimal allocation of a limited budget. This state is known as utility maximisation.

The principle is formally stated as the equi-marginal principle (or the law of equi-marginal utility):

\[\frac{MU_A}{P_A} = \frac{MU_B}{P_B} = \frac{MU_C}{P_C} = \cdots\]

where \(MU\) is the marginal utility derived from a good and \(P\) is its price. When this condition holds, the consumer cannot increase total satisfaction by reallocating spending from one good to another, meaning total utility is at its maximum given the budget constraint.

Maximising costs or cutting costs are objectives that apply to producers, not to consumer choice theory. Increasing profits is similarly a producer's goal. The concept described in the question is purely about a consumer arranging purchases to get the greatest possible satisfaction from a fixed income.

Detalles de la respuesta

Population growth rate measures how fast a country's population changes over time. It accounts for both natural change (births and deaths) and net migration (people moving in and out of the country).

The complete formula is:

\[\text{Population growth rate} = (\text{Birth rate} - \text{Death rate}) + (\text{Immigrants} - \text{Emigrants})\]

This can be rewritten as:

\[\text{Population growth rate} = \text{Birth rate} - \text{Death rate} + \text{Immigrants} - \text{Emigrants}\]

The birth rate minus death rate gives the natural increase in population. Adding immigrants (people entering the country) and subtracting emigrants (people leaving the country) gives the net migration effect. Together, these two components determine the overall population growth rate.

The formula "birth rate minus death rate" alone only captures the natural increase rate and ignores migration, so it is incomplete. The other options either misuse terminology (such as subtracting immigration from migration rate, which is redundant) or reverse the signs on immigrants and emigrants.

Detalles de la respuesta

The United Nations Conference on Trade and Development (UNCTAD) is the institution specifically concerned with expanding developing countries' commodity trade. Established in 1964, UNCTAD's core mission is to help developing nations integrate more effectively into the global economy, with particular attention to their commodity exports.

UNCTAD works to:

• Stabilize commodity prices that developing countries depend on for export revenue
• Negotiate preferential trade agreements that give developing country exports better access to developed-country markets
• Address the deterioration in terms of trade faced by commodity-exporting developing nations
• Provide technical assistance to help developing countries diversify their trade

While the other organizations play important roles in development, their primary mandates differ:

• The World Trade Organization (WTO) sets and enforces global trade rules for all member countries, not specifically for developing nations' commodity trade.
• The Economic Commission for Africa (ECA) is a regional UN body focused broadly on African economic and social development.
• The African Development Bank (AfDB) provides financing for development projects in Africa, rather than specifically expanding commodity trade.

Detalles de la respuesta

Infant mortality refers to the death of children under the age of one year. Since it measures deaths, it is a component of the death rate (also called the mortality rate) of a country.

The death rate is defined as the number of deaths per thousand of the population per year. Infant mortality is a subset of overall mortality and is one of the most closely watched indicators within it, as it reflects the quality of healthcare, nutrition, and sanitation in a country.

Net migration refers to the difference between the number of people entering a country (immigrants) and those leaving (emigrants), which has nothing to do with infant deaths. The fertility rate measures the average number of children born per woman, which relates to births, not deaths. The immigration rate measures only the inflow of people into a country from abroad.

Population growth is determined by the formula: Population Growth = (Birth Rate - Death Rate) + Net Migration. Infant mortality feeds into the death rate component of this equation.

Detalles de la respuesta

Price discrimination is the practice by which a seller charges different prices to different groups of buyers for the same good or service, where the price differences are not justified by differences in cost of production or delivery.

For price discrimination to be possible, certain conditions must hold:

• The seller must have some degree of market power (ability to influence price, typically a monopolist or firm with significant market share).
• The seller must be able to identify and separate different groups of buyers (by age, location, time of purchase, income level, etc.).
• There must be no possibility of resale (arbitrage) between the groups - buyers who get the lower price cannot resell to those who would pay the higher price.

Examples include cinemas charging different ticket prices for students, adults, and seniors; airlines charging different fares for the same seat depending on when the ticket is purchased; and electricity companies charging different rates for domestic and industrial users.

This concept is distinct from monopolistic competition (a market structure), monopoly (a single seller), and price determination (the process by which market price is established through supply and demand).

Detalles de la respuesta

A free market economy (also called a capitalist or laissez-faire economy) is one in which the government does not directly control what is produced, how it is produced, or for whom it is produced. Instead, these decisions are made by individual consumers and producers interacting through markets.

The mechanism that coordinates all these independent decisions is the price mechanism. Prices act as signals: when consumers want more of a good, demand rises, which pushes the price up. The higher price signals to producers that it is profitable to allocate more resources toward that good. Conversely, when demand falls, prices drop, and producers shift resources away. Through this process of rising and falling prices, resources are automatically directed toward the goods and services that consumers value most.

A state planning committee or a government department would allocate resources in a planned (command) economy, not a free market. Trade unions represent workers' interests and negotiate wages and conditions; they do not determine resource allocation in an economy.

The price mechanism is therefore the defining feature of a free market economy - it allocates scarce resources among competing uses without the need for central direction.

Detalles de la respuesta

A developing country is characterised primarily by a low income per head (low per capita income). Per capita income measures the average income earned per person in a country and is the most widely used indicator of a nation's level of economic development.

When income per head is low, it signals that the country's total output relative to its population is small, which typically correlates with limited industrialisation, lower standards of living, inadequate infrastructure, and reduced access to healthcare and education.

Low labour supply does not define a developing country. In fact, many developing countries have abundant labour, often with high rates of underemployment. A decreasing population is not a characteristic of developing nations either; most developing countries experience population growth rather than decline. A high contribution of the tertiary (services) sector to national income is actually a feature of developed economies, where the economy has progressed beyond primary and secondary production into services, finance, and technology.

The defining feature remains low per capita income, which reflects the overall economic productivity and living standards of the population.

Detalles de la respuesta

The characteristics listed - acceptability, durability, homogeneity, and portability - are all well-established attributes of good money. For any commodity or item to function effectively as money, it must satisfy several key properties:

• Acceptability - money must be widely accepted by everyone in the economy as a medium of exchange.
• Durability - money must be able to withstand wear and tear over time without losing its value or physical integrity.
• Homogeneity - every unit of money of the same denomination must be identical and interchangeable (a 100-naira note is the same as any other 100-naira note).
• Portability - money must be easy to carry from one place to another for transactions.

Other important attributes of good money include divisibility, stability of value, scarcity, and cognisability (easy to recognise). These attributes collectively ensure that money can efficiently perform its functions as a medium of exchange, store of value, unit of account, and standard of deferred payment.

Markets, government, and banks are institutions that use or regulate money, but they are not themselves described by these physical and functional attributes.

Detalles de la respuesta

The specialisation of labour enhances production because people can save time and produce more.

When workers specialise - that is, when each person concentrates on a single task or a narrow range of tasks - they become more skilled and efficient at those specific tasks. This efficiency gain works through several mechanisms:

• Reduced time switching: A worker who performs one task continuously does not lose time moving between different activities, tools, or workstations.
• Increased skill: Repetition builds expertise. A worker who focuses on one operation becomes faster and more accurate at it.
• Greater total output: Because each specialised worker produces more per unit of time, the combined output of all workers rises.

The other options contain important errors. Workers do not become "experts in all areas of production" - specialisation means becoming expert in one specific area. Workers cannot "efficiently produce their own needs" - specialisation actually increases dependence on trade, since each person produces only one thing and must exchange for everything else. And workers do not "concentrate on all goods they can produce better" - they concentrate on the specific good or task where they have the greatest advantage.

Detalles de la respuesta

Table I above illustrates the law of diminishing marginal utility. The law of diminishing marginal utility states that as a person
increases consumption of a product while keeping consumption of other products constant, there is a decline in the marginal
utility that person derives from consuming each additional unit of that product. In the table, as the units of quantity consumed increase, the marginal utility decreases.

Detalles de la respuesta

The Nigerian Industrial Development Bank (NIDB) was established to promote industrial development in Nigeria. Its primary objective was to provide medium- and long-term loans specifically to manufacturers and industrial enterprises. By financing manufacturing ventures, the NIDB aimed to accelerate industrialization, reduce Nigeria's dependence on imported manufactured goods, and create employment in the industrial sector.

The NIDB should not be confused with other specialised financial institutions in Nigeria:

• Loans to farmers were the domain of the Nigerian Agricultural and Co-operative Bank (NACB), later reorganised as the Bank of Agriculture (BOA).
• Estate agents and real estate development were served by the Federal Mortgage Bank of Nigeria (FMBN).
• Transporters did not have a dedicated development bank; transport businesses accessed general commercial lending.

The correct answer is manufacturers, because the NIDB was created as a development finance institution focused on the industrial and manufacturing sector of the Nigerian economy.

Detalles de la respuesta

Marginal utility (MU) is the additional satisfaction a consumer gains from consuming one more unit of a good. Total utility (TU) is the cumulative satisfaction from all units consumed. The relationship between them follows a predictable pattern governed by the law of diminishing marginal utility:

• When MU is positive (but declining), each additional unit still adds to total satisfaction, so TU is rising.
• When MU reaches zero, the consumer gains no extra satisfaction from the next unit, and TU is at its maximum.
• When MU becomes negative, additional consumption actually reduces satisfaction, and TU begins to fall.

Therefore, when total utility is falling, marginal utility is negative. This is the correct relationship.

The statement that when TU is maximum, MU is maximum is incorrect - at maximum TU, MU equals zero, not maximum. The claim that when TU is rising, MU is also rising is also incorrect - TU can rise while MU is falling (diminishing), which is exactly what the law of diminishing marginal utility describes. The statement that when TU is falling, MU is rising is contradictory and impossible under the standard utility framework.

Detalles de la respuesta

Before the discovery and commercial exploitation of petroleum in the late 1950s and 1960s, agriculture was Nigeria's greatest foreign exchange earner. The agricultural sector dominated the Nigerian economy and was the backbone of export revenue.

Nigeria's major agricultural exports during this period included:

• Cocoa - primarily from the Western Region (now southwestern Nigeria)
• Groundnuts (peanuts) - from the Northern Region
• Palm oil and palm kernels - from the Eastern Region
• Rubber - from the Mid-Western Region
• Cotton - from the Northern Region

These cash crops were exported in large quantities to Europe and other international markets, generating the bulk of Nigeria's foreign exchange. Each region of the country had marketing boards that coordinated the purchase and export of these commodities.

The other sectors were relatively minor foreign exchange earners: handicrafts were produced largely for local consumption, mining (of tin and columbite) contributed some export revenue but far less than agriculture, and manufacturing was in its infancy and largely import-dependent rather than export-oriented.

Detalles de la respuesta

Thomas Robert Malthus, in his 1798 work An Essay on the Principle of Population, argued that population increases in geometric progression (i.e., it multiplies: 2, 4, 8, 16, 32, ...) while food production increases only in arithmetic progression (i.e., it adds a constant amount: 1, 2, 3, 4, 5, ...).

Because a geometric series grows much faster than an arithmetic series, Malthus concluded that population would inevitably outstrip the food supply unless checked by what he called positive checks (famine, disease, war) or preventive checks (moral restraint such as delayed marriage).

The option stating the reverse, that population grows arithmetically while food grows geometrically, directly contradicts Malthus's theory. The option suggesting the two will be at par in the future is also incorrect because Malthus's central point was that they would diverge, not converge. The option about nations needing manpower to cultivate land describes a general statement about agricultural labour, not the specific population-food growth relationship Malthus proposed.

Detalles de la respuesta

A rise in government expenditure injects additional money into the economy. When the government spends more on infrastructure, salaries, transfers, or public services, aggregate demand increases. If the economy is already operating near full capacity, this increased demand cannot be matched by a proportional increase in the supply of goods and services. The result is higher inflation, a sustained rise in the general price level.

This outcome is explained by demand-pull inflation: excess demand relative to available supply bids up prices across the economy.

Higher government spending does not lead to higher unemployment; it typically reduces unemployment by creating jobs and stimulating economic activity. It does not directly cause lower profits for industries, since increased demand often boosts sales and revenue. It also does not lower importation of raw materials; in fact, higher economic activity often increases imports as firms need more inputs to meet rising demand.

The link between increased government expenditure and inflation is a central concept in fiscal policy analysis and is especially relevant when an economy is near or at full employment.

Detalles de la respuesta

Thomas Malthus, in his 1798 Essay on the Principle of Population, argued that population tends to grow faster than food supply. He identified two types of checks that keep population in balance with available resources:

• Positive checks - factors that increase the death rate, such as famine, disease, war, and epidemics. These are involuntary and painful ways by which population is reduced.
• Preventive checks - voluntary actions that reduce the birth rate, primarily moral restraint, which Malthus defined as delaying marriage and practising abstinence until one could afford to support a family.

Malthus argued that if people adopted moral restraint (the preventive check), population growth would slow voluntarily, and the painful positive checks of famine, disease, and death would be avoided. The preventive check prevents the positive check from operating.

Abolishing marriage is an extreme and impractical suggestion that Malthus never advocated. Reducing the death rate or building more hospitals would counteract positive checks after they occur rather than prevent them - and would actually worsen the population-food imbalance in Malthus's framework by allowing population to grow further.

Detalles de la respuesta

Mean wage = \(\frac{\sum{x}}{\text{n}}\)

= \(\frac{40+30+70+20+60+10+10+80+30+10}{10}\)

= \(\frac{360}{10}\) = $36

Detalles de la respuesta

Small firms (also called small-scale enterprises) play an important role in the economic development of a country. One of their key advantages is that they render personalised services to consumers. Because small firms deal with a smaller customer base, they can pay individual attention to each customer's needs, build personal relationships, offer customised products, and respond quickly to specific requests. This personal touch is something large-scale enterprises often cannot provide.

Other contributions of small firms to development include:

• Creating employment, especially in rural and semi-urban areas.
• Serving as training grounds for entrepreneurs and workers.
• Filling market niches that are too small for large firms to serve profitably.
• Promoting local resource utilisation and reducing regional inequality.

The other options describe disadvantages or inaccurate statements: producing goods only for the elite limits their developmental impact; not providing after-sales services is a weakness, not a strength; and having high prices would reduce their accessibility and contribution to welfare. None of these would justify claiming that small firms are important for development.

Detalles de la respuesta

Net migration measures the overall effect of migration on a country's population. It is calculated as the difference between the number of immigrants (people moving into the country) and the number of emigrants (people leaving the country) over a given period.

The formula is:

\[ \text{Net Migration} = \text{Number of Immigrants} - \text{Number of Emigrants} \]

If the result is positive, more people entered the country than left, and the country experienced net immigration. If negative, more people left than arrived, indicating net emigration.

The other options do not define net migration. Per capita income and population are measures of economic output and population size respectively. Internal and external migration are categories of migration based on whether movement occurs within or across national borders, but their difference does not define net migration. Population and census are general demographic concepts unrelated to the migration calculation.

When revising population topics, remember that net migration, along with the birth rate and death rate, determines the overall change in a country's population size.

Detalles de la respuesta

In economics, the term factor intensity describes which factor of production is used in the greatest proportion relative to others. When an agricultural production process uses more machinery relative to labour, it is described as capital intensive farming.

Capital, in economics, refers to man-made aids to production - machinery, equipment, tools, irrigation systems, storage facilities, and other physical assets used in the production process. Capital intensive farming relies heavily on these inputs rather than on manual human labour. Examples include using tractors instead of hand-held hoes, combine harvesters instead of manual cutting, and automated irrigation systems instead of hand-watering.

The other options describe different concepts:

• Land intensive farming would emphasize the use of large tracts of land relative to other factors.
• Large scale farming refers to the size of the farming operation, not specifically the ratio of machinery to labour.
• Commercial farming refers to farming for profit and sale rather than subsistence, regardless of how mechanized it is.

The specific emphasis on machinery relative to labour is the hallmark of capital intensive production.

Detalles de la respuesta

A country's balance of payments is a comprehensive record of all economic transactions between its residents and the rest of the world over a given period. It has two main components: the current account (covering visible and invisible trade) and the capital account (covering financial flows).

The balance of payments is said to be in deficit when the total payments for both visible imports (physical goods) and invisible imports (services such as shipping, insurance, tourism, and interest payments) exceed the total receipts from exports of visible and invisible goods. In other words, more money is flowing out of the country than is coming in.

The other options are incorrect because:

• A situation where only invisible payments exceed invisible receipts describes a deficit on the invisible trade balance alone, not the overall balance of payments.
• When total receipts exceed total payments, that describes a balance of payments surplus, not a deficit.
• Recording a surplus on the current account contradicts the concept of a deficit.

Detalles de la respuesta

This question requires you to reason about how simultaneous high death rates at the extremes of the age spectrum affect the population's age structure, assuming no migration.

When the death rate for old people is high, the elderly population shrinks rapidly. When the infant mortality rate is also high, many newborns and very young children die before reaching older childhood. With no migration to alter the numbers, the people who survive in largest numbers are those in between these two vulnerable groups - the younger people (broadly, adolescents and young adults who have passed the dangerous infant years but have not yet reached old age).

The result is a population structure with a bulge in the younger working-age bracket. Children are fewer because many die in infancy, and old people are fewer because of their high death rate. The population therefore has a higher proportion of younger people.

Note that "younger people" here is distinct from "children" - children include infants whose numbers are being reduced by the high infant mortality rate.