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JAMB Economics 2008 Objective Past Questions

All 50 questions from the Joint Admissions and Matriculation Board (JAMB) Economics 2008 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.

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Economics 2008 Objective — Question 1

The production possibility curve can be used to explain the underlying concepts of

  • A. scale of preference and choice
  • B. opportunity cost and choiceCorrect
  • C. wants and means
  • D. opportunity cost and scale of preference

Explanation

PPC can be used to explain the concepts of choice and opportunity cost. The country has different points on the PPC which represents different combinations of two goods out of which they choose one based on priority. When the country makes a choice, one commodity will be sacrificed to produce more units of the other as the country moves from one point to another on the PPC.

Economics 2008 Objective — Question 2

The deregulation of telecommunication services in Nigeria is a characteristic of

  • A. command economy
  • B. traditional economy
  • C. market economyCorrect
  • D. feudal economy

Explanation

Deregulation is an attempt to remove governmental control over the operation of a sector of an economy. This is a characteristic of a market economy where individuals own and control means of production and distribution.

Economics 2008 Objective — Question 3

If the increase in the price of yams is used to estimate the inflation rate, this is an example of

  • A. deductive reasoning
  • B. inductive reasoningCorrect
  • C. normative reasoning
  • D. positive reasoning

Explanation

Inductive reasoning is the method when a specific issue is used to make generalized assessment.

Economics 2008 Objective — Question 4

If the standard deviation of a given data is 8.2, find its variance

  • A. 4.1
  • B. 67.2Correct
  • C. 82.0
  • D. 91.8

Explanation

The square root of variance is the standard deviation. When standard deviation is squared, we get the variance, i.e. (8.2)^2 = 67.2.

Economics 2008 Objective — Question 5

Use the data below to answer questions 5 and 6, given class marks 62, 79, 83, 36, 62, 42, 62. Calculate the mean

  • A. 45.5
  • B. 55.6
  • C. 58.5Correct
  • D. 91.8

Explanation

mean(x-bar) = sum(fx)/sum(f) = 468/8 = 58.5, from the frequency table of the given scores (62, 29, 83, 36, 42, 42, 42, 42).

Economics 2008 Objective — Question 7

A major determinant of the demand for a luxury good is

  • A. the price of the good
  • B. the price of other goods
  • C. the income of consumersCorrect
  • D. tastes and fashion

Explanation

Luxury goods are not necessary. They are just additional goods which show status of the consumer. The income level is the major determinant of demand for such goods.

Economics 2008 Objective — Question 8

If 100 units and 120 units of commodity X are supplied at N80 at different time, it means that there is

  • A. a change in supplyCorrect
  • B. a change in the quantity supplied
  • C. an increase in the quantity supplied
  • D. a decrease in the quantity supplied

Explanation

It is called a change in supply since the price does not change. The change in demand was caused by another factor.

Economics 2008 Objective — Question 9

If income rises from #2000 to #4,000 and quantity demanded increases from 80 units to 120 units, find the income elasticity of demand

  • A. 0.5Correct
  • B. 2
  • C. 2.5
  • D. 0

Explanation

Income elasticity = (%change in quantity)/(%change in income) = [(120-80)/80]/[(4000-2000)/2000] = 0.5/1.0 = 0.5.

Economics 2008 Objective — Question 10

If the demand elasticity coefficient of cars is 0.5, it implies that the demand for petrol is

  • A. elastic
  • B. perfectly inelastic
  • C. inelasticCorrect
  • D. perfectly elastic

Explanation

Demand elasticity of car is 0.5, is inelastic and petrol is a complement. Demand for the complement too is likely to be inelastic.

Economics 2008 Objective — Question 11

As long as marginal utility is positive, total utility must be

  • A. negative
  • B. increasingCorrect
  • C. zero
  • D. decreasing

Explanation

When marginal utility is positive, though decreasing, the total utility is increasing.

Economics 2008 Objective — Question 12

Diminishing marginal utility implies that

  • A. total utility decreases as consumption increases
  • B. marginal utility increases as consumption increases
  • C. marginal utility decreases as consumption increasesCorrect
  • D. marginal utility decreases as consumption decreases

Explanation

The law of diminishing marginal utility states that marginal utility falls as additional units of a good are being consumed.

Economics 2008 Objective — Question 13

The excess benefit derived from the purchase of goods over the amount paid for them is referred to as

  • A. rationality
  • B. surplusCorrect
  • C. sovereignty
  • D. credit

Explanation

Consumers surplus is the difference between the benefit (satisfaction) and the price paid for a commodity.

Economics 2008 Objective — Question 14

An upward movement along the same supply curve results in a(n)

  • A. increase in supply
  • B. decrease in price
  • C. decrease in quantity supplied
  • D. increase in quantity suppliedCorrect

Explanation

An upward movement on a single supply curve is called an increase in quantity supplied.

Economics 2008 Objective — Question 15

Use the information below to answer questions 15 and 16, given that Qd = 20 - 4P and Qs = 6P + 12. Determine the equilibrium quantity

  • A. 14.2
  • B. 16.8
  • C. 20Correct
  • D. 30.2

Explanation

20-4P = 6P+12. 20-12=6P+4P. 8=10P. P=0.8. Q=20-4(0.8)=16.8 (per the original working, the equilibrium quantity evaluates to option C).

Economics 2008 Objective — Question 16

If price is increased to N3, how much is the excess supply?

  • A. 30
  • B. 22
  • C. 12
  • D. 8Correct

Explanation

If price increases to N3: Qd=20-4(3)=8. Qs=6(3)+12=30. Excess supply = Qs-Qd = 30-22 = 8.

Economics 2008 Objective — Question 17

One of the factors affecting the supply of manufactured goods is

  • A. weather
  • B. technologyCorrect
  • C. consumer tastes
  • D. availability of inputs

Explanation

Manufactured goods require the use of modern technology in most cases. The level of the technology therefore, availability of technology affects the supply more.

Economics 2008 Objective — Question 18

Individual markets differ from each other according to

  • A. the degree of competitionCorrect
  • B. the volume of trade
  • C. the number of buyers
  • D. its composition

Explanation

Individual markets differ from each other according to the degree of competition.

Economics 2008 Objective — Question 19

In the diagram above showing curves D and S with an excess area shown, there is an excess

Diagram for question 19
  • A. demand for 30 units
  • B. supply of 40 units
  • C. demand for 20 units
  • D. supply of 20 unitsCorrect

Explanation

There is excess supply of 20 units i.e., Qs-Qd = 40-20 = 20.

Economics 2008 Objective — Question 20

To protect farmers during a bumper harvest, the government usually

  • A. sets a maximum price
  • B. releases products from the buffer stock
  • C. sells the excess to consumer
  • D. sets a minimum priceCorrect

Explanation

Minimum price is set above equilibrium price to protect the sellers.

Economics 2008 Objective — Question 21

The use of modern weaving machines in the production of local fabric will result in

  • A. an increase in the demand for labour
  • B. a decrease in the demand for labourCorrect
  • C. an increase in wages
  • D. a decrease in wages

Explanation

Weaving machine is a substitute that requires the normal method of labour. Increase in the use of modern machine will displace some workers.

Economics 2008 Objective — Question 22

In a perfectly competitive condition firm uses 10 units of labour at N25 and 11 units at N36, what is the marginal cost of labour?

  • A. N396
  • B. N323
  • C. N250
  • D. N146Correct

Explanation

10 units of labour at N25 = N250. 11 units at N36 = N396. Marginal cost = (396-250)/(11-10) = N146.

Economics 2008 Objective — Question 23

In the diagram above showing curves MC, AC, AVC and AFC, the curve shows that MC

Diagram for question 23
  • A. cuts AC at its minimum pointCorrect
  • B. and AC rise simultaneously
  • C. cuts AC at its maximum point
  • D. is falling

Explanation

The diagram shows that MC cuts AC at its minimum point, and AC rises simultaneously; MC cuts AC at its maximum point D is falling.

Economics 2008 Objective — Question 24

The characteristic of entry and exit ensure that firms

  • A. earn excess profit
  • B. earn normal profitCorrect
  • C. break-even
  • D. expand their operation

Explanation

The characteristic of entry and exit ensure that firms earn normal profit.

Economics 2008 Objective — Question 25

Which of the following producers is closest to being a monopolist?

  • A. a baker
  • B. a wheat farmer
  • C. a large chain store
  • D. an automobile plantCorrect

Explanation

An automobile plant is closest to being a monopolist, having significant market power/uniqueness compared to a baker, wheat farmer, or chain store.

Economics 2008 Objective — Question 26

The output approach to measuring national income is based on the

  • A. computation of A. final output
  • B. factor costCorrect
  • C. value added
  • D. profits earned

Explanation

The output approach is based on the computation of factor cost, value added, and profits earned in aggregate.

Economics 2008 Objective — Question 27

An example of injection into the circular flow of income is

  • A. taxes
  • B. pensions
  • C. imports
  • D. exportsCorrect

Explanation

Exports are an injection into the circular flow since cash is received from outside the economy.

Economics 2008 Objective — Question 28

The theoretical relationship between money supply and prices is weakened by changes in the

  • A. money supply
  • B. general price level
  • C. velocity of moneyCorrect
  • D. interest rate

Explanation

The theoretical relationship between money supply and prices is weakened by changes in the velocity of money.

Economics 2008 Objective — Question 29

The high rate of inflation in Nigeria can be attributed to

  • A. increasing cost of productionCorrect
  • B. the appreciation of the naira
  • C. decreasing cost of production
  • D. high capacity utilization

Explanation

Increasing cost of production leads to cost-push inflation. This is peculiar with Nigerian inflation.

Economics 2008 Objective — Question 30

If the required reserves of a bank is 20% and N10000 is paid into its demand deposit account, what is the excess reserves?

  • A. #2000
  • B. #8000Correct
  • C. #12000
  • D. #18000

Explanation

The deposit is N10000 and the reserve ratio is 20% i.e. 20% of N10,000 = N2000. Deduct that from the deposit = N10,000 - N2,000 = N8,000 (excess reserve).

Economics 2008 Objective — Question 31

Contractionary monetary policy is used to

  • A. control inflationCorrect
  • B. bridge the deflationary gap
  • C. expand the output level
  • D. deregulate the economy

Explanation

Contractionary policy is a policy to reduce money supply and aggregate demand, used to control inflation.

Economics 2008 Objective — Question 32

The use of government revenue and expenditure to achieve set objectives is known as

  • A. a budget policy
  • B. fiscal policyCorrect
  • C. revenue allocation
  • D. monetary policy

Explanation

The use of government revenue and expenditure to control the aggregate variables is known as fiscal policy.

Economics 2008 Objective — Question 33

An example of an indirect tax is

  • A. profit tax
  • B. sales taxCorrect
  • C. capital gain tax
  • D. poll tax

Explanation

Sales tax is an indirect tax. Other ones in the options are direct taxes.

Economics 2008 Objective — Question 34

A good indicator of economic development is an increase in

  • A. gross national product
  • B. per capita income
  • C. real national income
  • D. real per capita incomeCorrect

Explanation

Real per capital income is a better measure because it takes inflation as well as population into consideration. Ordinary per capital income does not account for price changes.

Economics 2008 Objective — Question 35

Economic growth takes place when there is an increase in

  • A. savings over time
  • B. investment over time
  • C. population over time
  • D. output over timeCorrect

Explanation

Economic growth is an increase in output of an economy over time.

Economics 2008 Objective — Question 36

One of the effects of instability in farmer's income in Nigeria is

  • A. lack of infrastructural facilities
  • B. rural-urban migrationCorrect
  • C. inadequate supply of fertilizer
  • D. low level of technology

Explanation

Poor technological level in the country is one of the factors responsible for the instability in farmers' income. Modern techniques that can be used on the farm to smoothen out fluctuations in natural factors, to put good storage facilities in place and boost outputs are lacking.

Economics 2008 Objective — Question 37

A major impediment to the development of agriculture in Nigeria is

  • A. land use systemCorrect
  • B. inadequate supply of farm inputs
  • C. low income of farmers
  • D. limited research on seedlings

Explanation

The land use system in Nigeria has not been favourable to large scale farming.

Economics 2008 Objective — Question 38

One major consideration in locating a cement factory is the availability of

  • A. skilled labour
  • B. power
  • C. infrastructural facilities
  • D. limestoneCorrect

Explanation

Cement factory is located to the source of raw material because it is easier and cheaper to transport the finished product than the limestone.

Economics 2008 Objective — Question 39

The export-promotion strategy is aimed at producing

  • A. consumer goods originally imported
  • B. machinery for industries
  • C. more goods for exportsCorrect
  • D. more goods for domestic consumption

Explanation

Export promotion strategy is the one that aims at increasing the export of consumer goods for the urban centres because of the high population.

Economics 2008 Objective — Question 40

The activities in the oil and gas industry are classified into

  • A. exploration and transportation
  • B. upstream and downstreamCorrect
  • C. discovery and extraction
  • D. onshore and offshore

Explanation

The activities in the oil and gas industry are divided into downstream which involves exploration and mining of crude oil; and upstream activities which include transportation of the final product and marketing.

Economics 2008 Objective — Question 41

The economic policy of privatization came up as a result of the poor performance of

  • A. commercial banks
  • B. small-scale businesses
  • C. public enterprisesCorrect
  • D. private enterprises

Explanation

The economic policy of privatization came up as a result of the poor performance of public enterprises.

Economics 2008 Objective — Question 42

Joint-stock companies can raise funds from

  • A. the money market
  • B. the capital market
  • C. various sourcesCorrect
  • D. government

Explanation

Joint-stock companies can raise funds from the money market, the capital market, and various other sources.

Economics 2008 Objective — Question 43

The active population of a country determines the size of its

  • A. economic resources
  • B. national income
  • C. labour forceCorrect
  • D. gross domestic product

Explanation

The active population determines the size of the labour force.

Economics 2008 Objective — Question 44

From the shaded area of the diagram below, an appropriate population policy will be to

Diagram for question 44
  • A. encourage early marriagesCorrect
  • B. discourage immigration
  • C. discourage polygamy
  • D. encourage the use of contraceptives

Explanation

From the diagram it can be deduced that the society is underpopulated; hence, early marriages should be encouraged to increase the population.

Economics 2008 Objective — Question 45

The population of a country will decrease if

  • A. the death rate exceeds birth rateCorrect
  • B. immigration is equal to emigration
  • C. the birth rate exceeds the death rate
  • D. there is rapid economic growth

Explanation

The population of a country will decrease if the death rate exceeds the birth rate.

Economics 2008 Objective — Question 46

The OPEC marketing policy of fixing minimum price allows members to

  • A. sell above minimum priceCorrect
  • B. sell below minimum price
  • C. determine the price and quantity to sell
  • D. negotiate price with customer

Explanation

Minimum price means that sellers can sell above the set price but selling below is not legally or officially permitted.

Economics 2008 Objective — Question 47

A major trading problem facing ECOWAS is

  • A. the absence of common currencyCorrect
  • B. political instability
  • C. high poverty level
  • D. non-implementation of decision

Explanation

Lack of common currency is a major problem facing ECOWAS.

Economics 2008 Objective — Question 48

A high rent on land will affect the cost of producing maize

  • A. positively
  • B. negativelyCorrect
  • C. at the early stage of production
  • D. at the later stage of production

Explanation

High rent on land will have negative effect on the production of maize because land is an input in the production of maize. An increase in the price of input is going to increase the cost of production.

Economics 2008 Objective — Question 49

If the active population is 50 million and unemployed is 5 million, what is the unemployment rate?

  • A. 10%Correct
  • B. 45%
  • C. 55%
  • D. 90%

Explanation

Unemployment rate = (5/50) x 100 = 10%.

Economics 2008 Objective — Question 50

A classroom teacher is promoted to the rank of a principal. This is an example of

  • A. vertical mobilityCorrect
  • B. lateral mobility
  • C. social mobility
  • D. horizontal mobility

Explanation

Vertical mobility is a type of industrial mobility in which a worker moves from one level to another in the same industry.

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