JAMB Economics Past Questions & Answers - Page 49

241.

Whether a monopolist is able to increase his revenue by restricting his output depends on the shape of the________

A.

Marginal product

B.

Marginal cost curve

C.

Demand curve

D.

Average cost curve

Correct answer is C

A monopolist can either decide his output or the price at which he will sell, but not both. A monopolist must consider elasticity of demand, since his aim is to produce the output that will yield him maximum profit.
If the demand curve is elastic, he will decrease his price and if it is inelastic, he will increase his price in order to earn revenue.

242.

An example of a market which approaches fairly near to perfection is____________

A.

he retail market

B.

The house market

C.

The labour market

D.

The foreign exchange market

Correct answer is D

The foreign exchange market is a market which deals with foreign exchange transactions and it involves the buying and selling of foreign currencies.

243.

Which of the following matters may account for changes in demand?
I - changes in consumer preferences
II - changes in real income
III - changes in distribution of incomes
IV - changes in levels of taxation

A.

I, II

B.

II, III

C.

I, III, IV

D.

I, II, III, IV

Correct answer is D

Consumer preferences (Taste), Income, taxation, advertisement, population, weather conditions, price of other commodities are shift. Factors that affect or change or shift the demand curve.

244.

A commodity is defined as normal when its demand changes in the same direction as______

A.

Income

B.

Price

C.

Taste

D.

Preference

Correct answer is A

A commodity whose income elasticity is positive is a normal good because more of it is purchased as the consumer's income increases.

245.

Effective demand for a commodity is desire for that commodity backed by______

A.

A wish for the lowest possible price

B.

Ability and willingness to pay

C.

Cash in one's pocket

D.

A promise to make payment

Correct answer is B

Effective demand is the desire, backed by willingness and ability, to buy at a given price.