NECO 2026 Economics Theory Answers (Type A) for Nigerian Students

This guide presents well-organised notes based on the NECO 2026 Economics Theory (Type A). Use it to revise key concepts, practise solving questions, and understand how to structure your answers in the exam.

Question 1: Income Elasticity of Demand and Elasticity of Supply

Use the data given to calculate income elasticity of demand and interpret the result, then explain factors affecting elasticity of supply.

Calculation of income elasticity of demand
% change in Quantity Demanded / % change in Income
% change in Quantity = (20 − 10) / 10 × 100 = 100%
% change in Income = (5000 − 2000) / 2000 × 100 = 150%
Income Elasticity = 100 / 150 = 0.67
Therefore, the coefficient is 0.67.
Interpretation of the coefficient
Since the coefficient 0.67 is positive but less than 1, the demand is inelastic. This means that quantity demanded increases less than proportionately to income.
Classification of the good
Milk is a normal necessity good to Mr. Shaba because income elasticity is positive but less than 1. Demand rises as income rises (YEd is positive), but less than proportionately.
Factors that affect elasticity of supply
1. Time period: The longer the time producers have to respond to a price change, the more elastic supply becomes (supply is often inelastic in the short run and more elastic in the long run).
2. Nature of the commodity: Perishable goods (e.g. tomatoes, fish) tend to have inelastic supply since they cannot be stored; durable goods can have more elastic supply.
3. Cost and ease of factor substitution: How easily a firm can switch resources into producing more of the good.

Question 2: Measures of Central Tendency and Dispersion

Given the income data (in thousands): 20, 10, 12, 16, 10, 14, 18, 10, 16, 14. Arranged in ascending order: 10, 10, 10, 12, 14, 14, 16, 16, 18, 20 (N = 10).

Modal income
Mode = 10 thousand = ₦10,000 (appears 3 times).
Median income
Median = Average of 5th and 6th term = (14 + 14) / 2 = 14 thousand = ₦14,000.
Mean income
Sum = 140
Mean = 140 / 10 = 14 thousand = ₦14,000.
Standard deviation
Mean = 14
Sum of squared deviations = 112
Variance = 112 / 10 = 11.2
Standard deviation = √11.2 = 3.35 thousand = ₦3,350.

Question 3: Functions of an Entrepreneur

Risk bearing
The entrepreneur assumes both business and financial risks. He invests his capital with the hope of making profit but there is no guarantee.
Factor combination and coordination
The entrepreneur brings together land, labour and capital and combines them efficiently to avoid waste and increase productivity.
Decision making
He takes major decisions concerning the business — what to produce, quantity, method, location, and price.
Innovation
The entrepreneur introduces new ideas, products, methods of production and markets. Example: Introduction of online banking and fintech in Nigeria.
Provision of capital
The entrepreneur provides capital from personal savings or borrowings, and reinvests profit to expand the business.

Question 4: Effective Demand and Factors Affecting Demand

Meaning of effective demand
Effective demand refers to the desire for a commodity backed by willingness and ability to pay for it at the prevailing market price and at a particular time. Without purchasing power, demand is not effective. Example: A student who desires a laptop but has no money — that is not effective demand. Effective demand determines the level of production in an economy.
Factors that affect the demand for a commodity
1. Price of the commodity: Inverse relationship — when price falls, consumers buy more. Example: When price of sachet water falls from ₦20 to ₦10, more people buy.
2. Income of consumers: For normal goods, higher income increases demand. For inferior goods, higher income reduces demand.
3. Price of related goods: For substitutes, higher price of one increases demand for the other. For complements, higher price of one reduces demand for the other.
4. Tastes, preferences and fashion: Advertising, celebrity endorsement and lifestyle changes affect demand. Example: Demand for iPhone increased due to brand preference.
5. Size of population: Larger population means more consumers and higher demand. Example: High food demand in Nigeria due to large population.

Question 5: Price System and Its Importance

Meaning of price system
Price system is an economic mechanism in which prices of goods and services are determined by the forces of demand and supply without government interference. It is the major coordinating device in a capitalist economy. Prices act as signals to producers and consumers. Scarce goods have high prices while abundant goods have low prices.
Importance of the price system
1. Allocation of scarce resources: Ensures limited resources go to areas of highest demand. Example: High crude oil price attracts investment into the oil sector.
2. Determination of what to produce: Producers use price as a guide — high-priced goods are produced more, low-priced goods are reduced.
3. Rationing of scarce goods: Rising prices during scarcity discourage excessive consumption. Example: High fuel price during scarcity reduces wastage.
4. Income distribution: Determines how national income is shared — wages, rent, interest, and profit.
Differences between capitalist and socialist price system
1. Determination of price: Capitalist — prices determined by demand and supply. Socialist — prices fixed and controlled by government.
2. Objective of pricing: Capitalist — profit maximization. Socialist — social welfare and equal distribution.

Question 6: Marketing Board and Its Functions

Meaning of marketing board
A Marketing Board is a government-established statutory body responsible for buying agricultural produce from farmers at guaranteed prices, storing, processing and marketing them locally and internationally. Examples in Nigeria: Cocoa Marketing Board, Groundnut Marketing Board, Palm Produce Marketing Board.
Functions of marketing board
1. Price stabilization: Buys produce at stable guaranteed prices, protecting farmers from losses and consumers from exploitation by middlemen.
2. Provision of storage and processing facilities: Provides warehouses, silos and processing plants to reduce post-harvest losses and add value before export.
3. Export promotion and foreign exchange earnings: Organizes export of cash crops like cocoa and groundnut; foreign exchange earned finances government projects.
4. Provision of credit and input to farmers: Provides fertilizers, seedlings and loans to increase production and improve farmers’ standard of living.
5. Research and quality control: Conducts research on better farming methods and ensures exported produce meets international quality standards.

Question 7: Factors Militating Against Rapid Industrialisation in Nigeria

Inadequate power supply
Erratic electricity forces industries to spend heavily on diesel generators, increasing production costs.
Poor infrastructure
Bad roads, inadequate rail, poor ports and inefficient communication increase costs and delay distribution.
Insufficient capital
Entrepreneurs lack adequate capital; banks charge high interest rates and demand collateral small businesses cannot provide.
Political instability and policy inconsistency
Frequent government changes create uncertainty and discourage long-term investment.
Low level of technology
Use of obsolete machines leads to low productivity, poor quality goods and high production costs.
Poor management and corruption
Embezzlement and corruption lead to inefficiency and closure of government-owned industries.
Competition from imported goods
Cheap foreign goods make it difficult for local industries to survive.

Question 8: Relationship Between Savings and Investment

Relationship between savings and investment
Savings is the portion of income not spent on consumption; investment is the use of saved funds to acquire capital goods. There is a positive relationship — savings provide loanable funds that banks lend to investors. Higher savings → lower interest rates → more investment → capital formation and economic growth. In Keynesian theory, savings and investment are equal at equilibrium income level.
Factors that affect personal consumption expenditure
1. Level of disposable income: Higher disposable income (after-tax income) leads to higher consumption. Low income earners spend almost all income on basic needs.
2. Price level: Inflation reduces purchasing power; consumption falls when prices rise. During deflation, people buy more.
3. Rate of interest: High interest rates encourage saving and discourage borrowing, so spending falls. Low rates encourage borrowing and spending.
4. Consumer expectations: If consumers expect rising prices, they buy more now. If they expect recession or job loss, they save more and spend less.
5. Availability of credit: Easy access to loans and hire purchase encourages consumption even without full cash.

Question 9: Concepts and Theories of Population

Under population
Population too small to effectively utilize available natural resources. Results in labour shortage, low production, under-utilization of resources. Example: Canada and Australia in some regions. Solution: encourage immigration.
Over population
Population too large relative to available resources. Results in unemployment, poverty, congestion, pressure on social amenities, low standard of living. Example: Nigeria and India. Solution: birth control measures.
Optimum population
Ideal population size where resources are fully utilized and per capita income is maximum. Full employment exists. Any increase or decrease reduces per capita income.
Malthusian population theory
Population grows geometrically (1,2,4,8) while food supply grows arithmetically (1,2,3,4). Unchecked, population outgrows food supply causing famine, war and disease. Preventive checks: late marriage, moral restraint. Positive checks: famine, war, disease, natural disasters.

Question 10: Supply of Labour

Meaning of supply of labour
The number of man-hours that workers are willing and able to offer for employment at a given wage rate within a given period. It depends on the number of people and hours willing to work and is different from the labour force (total number willing to work).
Factors that affect the supply of labour
1. Wage rate: Higher wages attract more people and encourage longer hours and overtime.
2. Size and growth of population: Larger population increases available workers; immigration increases supply, emigration reduces it.
3. Level of education and skill: Education improves quality and productivity of labour, increasing effective supply.
4. Social and cultural factors: Attitude to work, retirement age, minimum wage laws and women's participation affect labour supply.
5. Health and working conditions: Good health and better conditions encourage people to work longer; poor health and hazardous conditions reduce supply.
6. Government policy: Policies on retirement age, immigration, taxation and labour laws influence the labour force size.

Question 11: Comparative Cost Advantage

Meaning of comparative cost advantage
The ability of a country to produce a particular commodity at a lower opportunity cost than another country. A country should specialize where it has lower opportunity cost and trade with others. The theory was propounded by David Ricardo.
Assumptions of comparative cost advantage theory
1. Two countries and two goods model: Trade takes place between two countries producing two commodities. Example: Nigeria producing crude oil and cocoa, Ghana producing gold and cocoa.
2. Free trade exists: No trade barriers (tariffs, quotas, or restrictions) between trading countries.
3. Factors of production are immobile between countries: Labour and capital move freely within a country but not between countries.
4. No transportation costs: No costs in transporting goods from one country to another.
5. Constant returns to scale: As production increases, cost per unit remains constant; no economies or diseconomies of scale.
6. Perfect competition: No single buyer or seller can influence price in product or factor markets.
7. Full employment of resources: All factors of production are fully employed in both countries.

Question 12: Functions of EFCC

Investigation of economic and financial crimes
Investigates money laundering, advance fee fraud “419”, internet fraud, terrorism financing, illegal bunkering and corruption.
Prosecution of offenders in court
Charges suspects to competent courts; punishment deters others.
Prevention of crimes through public enlightenment
Educates the public through seminars, workshops, radio and TV programs; works with schools and banks.
Tracing, freezing and recovery of proceeds of crime
Traces assets, freezes accounts, recovers money and properties forfeited to the federal government.
Collaboration with local and international agencies
Works with ICPC, CBN, NFIU, INTERPOL, FBI and foreign agencies to share intelligence and track criminals across borders.
Enforcement of financial laws
Enforces the Money Laundering Act, Advance Fee Fraud Act and other financial regulations.
Advisory role to government
Advises the federal government on matters relating to economic and financial crimes prevention and control.

Tip for students: When answering theory questions in NECO Economics, always define key terms clearly, use relevant Nigerian examples, show all calculations, and write your points in well-numbered, concise sentences as demonstrated above.