Market Structures

114 questions

All types114 Multiple choice63 True / False21 Numeric6 Matching24

A state-owned electric power distribution company operating as a monopoly charges domestic households a higher rate per kilowatt-hour than industrial factories. For this pricing policy to successfully increase the monopoly's total revenue, which condition regarding demand elasticity and market structure must hold?

Domestic households must have a relatively price-inelastic demand, and seepage between the domestic and industrial sub-markets must be prevented.

Domestic households must have a relatively price-elastic demand, allowing the firm to gain greater total revenue by charging higher unit prices.

The pricing strategy must completely eliminate consumer surplus in both sub-markets by charging each individual consumer their maximum willingness to pay.

Raising electricity rates for domestic households will cause an outward shift in their demand curve, leading to higher consumption at higher prices.

Show answer & explanation

Answer: Domestic households must have a relatively price-inelastic demand, and seepage between the domestic and industrial sub-markets must be prevented.

Answer

Domestic households must have a relatively price-inelastic demand, and market seepage (arbitrage) between sub-markets must be strictly prevented.

For third-degree price discrimination to increase total revenue, the monopolist must charge a higher price in the sub-market where demand is relatively less price-elastic (inelastic) and ensure the sub-markets are separated so buyers cannot purchase in the cheaper market and resell in the dearer market.

Step-by-Step Solution

Identify the type of price discrimination described in the scenario.

Charging different prices to distinct consumer groups (domestic vs. industrial) based on market segmentation represents third-degree price discrimination.

The monopolist separates buyers into identifiable sub-markets rather than charging individual prices or block tariffs to single consumers.

Apply the price elasticity rule for third-degree price discrimination.

Higher prices must be assigned to the sub-market with lower price elasticity of demand (

|E_d| < 1

), while lower prices are assigned to the sub-market with higher price elasticity of demand (

|E_d| > 1

Inelastic demand means price increases lead to a smaller percentage decline in quantity demanded, thereby increasing total revenue in that sub-market.

Verify structural prerequisite conditions for successful discrimination.

The firm must possess monopoly power, sub-markets must be clearly separable, and arbitrage (seepage/resale) must be impossible.

If industrial buyers could resell low-cost electricity back to domestic consumers, the price differential would collapse.

Key Concept

Conditions for Third-Degree Price Discrimination

Estimated Time:1m 15s

Question 62Question →

In long-run equilibrium, a profit-maximizing monopolist can sustain supernormal profits primarily because high barriers to entry prevent new firms from entering the market.

True

False

Show answer & explanation

Answer: True

Answer

True. A monopolist can sustain supernormal profits in the long run because entry barriers prevent new firms from entering the market.

In monopoly markets, high barriers to entry prevent new competing firms from entering the industry when supernormal profits exist. This structural protection enables the single seller to maintain economic profits in both the short run and the long run.

Step-by-Step Solution

Analyze the long-run feature of a monopoly market.

Monopolies are characterized by strong barriers to entry (e.g., legal protections, economies of scale, control of key resources).

Entry barriers dictate whether supernormal profits will attract new supply into the market.

Compare long-run outcome in monopoly with competitive markets.

Unlike perfect competition where free entry drives long-run profit to zero (normal profit), monopoly entry barriers preserve long-run supernormal profit.

Because no new firms can enter to expand market supply, the price remains above average total cost at the profit-maximizing output level where marginal revenue equals marginal cost.

Key Concept

Long-Run Monopoly Equilibrium and Barriers to Entry

Question 63Question →

Match each source of monopoly power on the left with its corresponding economic foundation or market scenario on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Natural Monopoly matches with continuous long-run average cost decline over market demand; Statutory Monopoly matches with exclusive government decrees or charters; Technological Monopoly matches with proprietary technical knowledge and patents; Collusive Monopoly matches with formal agreements among independent firms to jointly dictate prices.

Each classification accurately reflects the underlying economic origin of market power: Natural monopoly relies on structural economies of scale; Statutory monopoly relies on state legal grants; Technological monopoly relies on patents and secret processes; and Collusive monopoly relies on cartel agreements among independent firms.

Step-by-Step Solution

Analyze Natural Monopoly

Identified that natural monopolies stem from structural economies of scale where a single firm's long-run average cost (LRAC) declines throughout the market capacity.

Economic theory defines a natural monopoly by cost advantages arising naturally from scale rather than legal barriers.

Analyze Statutory Monopoly

Linked statutory monopoly to government laws, decrees, or public utility concessions.

Statutory barriers are explicitly created by legal authority.

Analyze Technological Monopoly

Connected technological monopoly to patents and exclusive technical know-how.

Control over technical processes prevents rivals from entering the industry due to technical entry barriers.

Analyze Collusive Monopoly

Matched collusive monopoly with cartels and output-coordination agreements among separate producers.

When oligopolists collude formally, they acquire collective monopoly power by behaving as a single firm.

Key Concept

Classification of Sources of Monopoly Power

Question 64Question →

A single-price monopolist operates with a total revenue function given by $TR = 120Q - 3Q^2$ and a total cost function given by $TC = 100 + 20Q + 2Q^2$ , where $Q$ represents the output quantity in units and figures are in Naira (₦). What is the profit-maximizing price charged by the firm?

₦90

₦60

₦40

₦20

Show answer & explanation

Answer: ₦90

Answer

The profit-maximizing price is ₦90.

To maximize profits, a monopolist produces where marginal revenue equals marginal cost (

MR = MC

). Differentiating total revenue

TR = 120Q - 3Q^2

yields

MR = 120 - 6Q

, and differentiating total cost

TC = 100 + 20Q + 2Q^2

yields

MC = 20 + 4Q

. Setting

120 - 6Q = 20 + 4Q

solves to

Q = 10

units. The demand equation for price is

P = \frac{TR}{Q} = 120 - 3Q

. Substituting

Q = 10

gives

P = 120 - 3(10) = ₦90

Step-by-Step Solution

Derive the Marginal Revenue (MR) and Marginal Cost (MC) functions.

MR = \frac{dTR}{dQ} = 120 - 6Q

and

MC = \frac{dTC}{dQ} = 20 + 4Q

Profit maximization occurs at the output level where Marginal Revenue equals Marginal Cost.

Set MR equal to MC to solve for profit-maximizing output quantity (

Q

120 - 6Q = 20 + 4Q \implies 100 = 10Q \implies Q = 10

units.

Equating MR and MC identifies the specific output level that maximizes total profit.

Determine the Average Revenue (Demand) equation and solve for Price (

P

P = \frac{TR}{Q} = 120 - 3Q

. Substituting

Q = 10

yields

P = 120 - 3(10) = ₦90

A monopolist sets its price based on what consumers are willing to pay for the profit-maximizing output according to the demand curve.

Key Concept

Monopoly Profit Maximization (

MR = MC

and Price Determination)

Estimated Time:1m 30s

Question 65Question →

Match each type of monopoly origin listed on the left with its corresponding defining operational basis on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Statutory Monopoly pairs with exclusive government charters; Natural Monopoly pairs with continuous economies of scale; Raw Material Monopoly pairs with absolute control of vital inputs; Technological Monopoly pairs with patent protection for technical inventions.

Each classification of monopoly power corresponds directly to its underlying barrier to entry: statutory monopolies stem from legal government decrees, natural monopolies arise from substantial economies of scale, raw material monopolies are rooted in exclusive resource ownership, and technological monopolies originate from patent-protected innovations.

Step-by-Step Solution

Examine legal and institutional sources of monopoly power.

Statutory monopoly relies on legislative backing and legal barriers, whereas technological monopoly relies on patent protection for inventions.

Different legal protections define distinct barriers to entry.

Analyze structural economic conditions leading to single-firm dominance.

Natural monopoly is driven by significant economies of scale, causing unit costs to drop as output expands.

Duplicate infrastructure would result in higher average costs for consumers.

Identify physical resource dominance as an entry barrier.

Raw material monopoly is secured through complete control of essential natural resources.

Competitors cannot manufacture the final good without access to the critical raw material.

Key Concept

Sources of Monopoly Power and Barriers to Entry

Question 66Question →

An electricity distribution firm operates in a municipality where substantial initial infrastructural investment causes its long-run average cost to continuously decline over the entire range of market demand. Which of the following best explains the fundamental source of this firm's monopoly power?

Substantial economies of scale that render single-firm production more cost-effective than multi-firm competition, establishing a natural monopoly

Exclusive statutory patent rights granted by the state government preventing rival firms from distributing electrical energy

Complete ownership and cartellized control over all strategic raw materials required for power generation

A perfectly price elastic demand curve that allows the firm to set price above marginal revenue without losing buyers

Show answer & explanation

Answer: Substantial economies of scale that render single-firm production more cost-effective than multi-firm competition, establishing a natural monopoly

Answer

Substantial economies of scale that render single-firm production more cost-effective than multi-firm competition, establishing a natural monopoly.

The correct answer accurately points out that when long-run average cost declines over the entire extent of market demand, significant economies of scale enable a single firm to produce at a lower cost per unit than multiple firms, giving rise to a natural monopoly.

Step-by-Step Solution

Analyze the firm's cost structure provided in the scenario

The firm experiences continuously falling long-run average costs (LRAC) across the entire range of market demand due to massive overhead fixed costs.

This structural condition indicates that minimum efficient scale is large relative to market size.

Classify the specific origin of monopoly power

This cost dynamic defines a natural monopoly rooted in economies of scale.

Duplication of distribution networks by competing firms would raise average costs for all firms and split demand inefficiently.

Differentiate from alternative sources of monopoly power

Natural monopolies arise from technology and cost structures, distinguishing them from legal monopolies (patents/licenses) or key resource control.

Selecting the accurate economic rationale demonstrates mastery of monopoly origin classifications.

Key Concept

Natural Monopoly and Economies of Scale

Question 67Question →

A profit-maximizing monopolist is guaranteed to earn economic profits in the short run because it is the sole producer in the market.

True

False

Show answer & explanation

Answer: False

Answer

False

The statement is false because a monopolist's short-run financial performance depends on the relationship between price (average revenue) and average total cost at the output quantity where

MR = MC

. If average total cost exceeds price, the firm operates at a short-run economic loss despite being the sole seller in the industry.

Step-by-Step Solution

Identify the profit-maximizing output condition for a monopolist

The monopolist determines output level where Marginal Revenue equals Marginal Cost (

MR = MC

Equating

MR

and

MC

maximizes total profit or minimizes total loss in the short run.

Compare Average Revenue (Price) with Average Total Cost at this output level

Financial performance depends on whether

P > ATC

(economic profit),

P = ATC

(normal profit), or

P < ATC

(economic loss).

Monopoly power enables price setting along the market demand curve, but cannot compel consumers to pay more than their demand curve allows.

Evaluate short-run profit outcomes

If market demand is low or fixed costs are high such that

P < ATC

while

P \ge AVC

, the monopolist continues operating in the short run at an economic loss.

Being the sole producer does not shield a firm from demand deficiencies or excessive production costs.

Key Concept

Short-run monopoly loss and profit determination

Question 68Question →

A cinema operator charges adult moviegoers a higher admission fee while offering discounted ticket rates to students for the exact same movie screening. Which of the following conditions is essential for the cinema operator to successfully maintain this pricing practice?

The price elasticity of demand for movie tickets must differ between the adult and student market segments.

The price elasticity of demand must be identical and perfectly inelastic across both consumer groups.

Student ticket holders must be permitted to resell their discounted tickets to adult moviegoers.

An increase in admission price automatically shifts the overall market demand curve for cinema tickets outward.

Show answer & explanation

Answer: The price elasticity of demand for movie tickets must differ between the adult and student market segments.

Answer

The price elasticity of demand for movie tickets must differ between the adult and student market segments, and the monopolist must be able to prevent ticket resale between the two groups.

For a monopolist to successfully practice third-degree price discrimination, three primary conditions must be met: market power, effective separation of sub-markets (to prevent arbitrage), and differing price elasticities of demand between consumer groups. By charging a higher price to adult moviegoers (who have less elastic demand) and a lower price to students (who have more elastic demand), the cinema operator maximizes total revenue and profit.

Step-by-Step Solution

Identify the economic concept described in the scenario.

The cinema operator is practicing third-degree price discrimination by charging different prices to different customer groups for identical services.

Recognizing the market structure and pricing strategy sets up the necessary theoretical requirements.

Evaluate the key conditions required for price discrimination to be effective.

The seller must have monopoly power, sub-markets must be effectively separated to prevent arbitrage (resale), and price elasticities of demand must differ across sub-markets.

Monopolists maximize profit by charging higher prices in the market segment with less elastic (more inelastic) demand and lower prices where demand is more elastic.

Key Concept

Conditions for Monopoly Price Discrimination

Question 69Question →

A monopolist can successfully practice third-degree price discrimination between two separated sub-markets even if the price elasticity of demand is identical in both sub-markets.

True

False

Show answer & explanation

Answer: False

Answer

The statement is False. Differing price elasticities of demand between sub-markets are required for third-degree price discrimination.

The statement is false because a monopolist requires differing price elasticities of demand in separated sub-markets to charge different prices. When demand elasticities are identical, setting marginal revenue equal across sub-markets results in equal prices, meaning no price discrimination occurs.

Step-by-Step Solution

State the condition for profit maximization across separated sub-markets.

A monopolist maximizes total profit by setting marginal revenue in each market equal to marginal cost:

MR_1 = MR_2 = MC

Equating marginal revenue across markets ensures optimal allocation of sales.

Apply the relationship between price (

P

), marginal revenue (

MR

), and price elasticity of demand (

e

MR = P \left(1 - \frac{1}{|e|}\right)

This formula connects pricing power directly to market elasticity.

Evaluate the result when price elasticities of demand are identical (

|e_1| = |e_2|

P_1 \left(1 - \frac{1}{|e|}\right) = P_2 \left(1 - \frac{1}{|e|}\right) \implies P_1 = P_2

If elasticity is identical in both markets, the calculated profit-maximizing price is also identical, rendering price discrimination impossible.

Key Concept

Necessity of Differing Demand Elasticities for Price Discrimination

Estimated Time:45s

Question 70Question →

A firm operating in a monopolistically competitive market currently produces $10$ units of output where its marginal revenue ( $MR$ ) equals marginal cost ( $MC$ ). At this output, the product sells at a market price ( $P$ ) of $\$40$ , while the average total cost ( $ATC$ ) is $\$30$ . Based on economic theory, which of the following long-run market adjustments will occur, and what will be the resulting economic profit position of this firm?

New firms will enter the market, causing the demand curve for this firm's product to shift to the left until price equals average total cost and economic profit is reduced to zero.

Existing firms will expand output to reach the minimum point of their average total cost curve, resulting in long-run productive efficiency and zero economic profit.

New firms will enter the market, forcing the firm to cut prices until marginal revenue equals average total cost, resulting in short-term economic losses.

High entry barriers will block potential competitors, allowing the firm to maintain its price of

\$40

and preserve economic profit of

\$100

indefinitely.

Show answer & explanation

Answer: New firms will enter the market, causing the demand curve for this firm's product to shift to the left until price equals average total cost and economic profit is reduced to zero.

Answer

New firms will enter the market, causing the demand curve for this firm's product to shift to the left until price equals average total cost and economic profit is reduced to zero.

In the short run, the firm earns positive economic profit because price (

\$40

) exceeds average total cost (

\$30

). Due to freedom of entry in monopolistically competitive markets, these profits attract new sellers offering competing differentiated products. Entry decreases demand for the incumbent firm's specific brand, shifting its demand curve to the left until price equals average total cost at the output where marginal revenue equals marginal cost, leaving the firm with zero economic profit in the long run.

Step-by-Step Solution

Determine short-run profit status

Economic profit per unit =

P - ATC = \$40 - \$30 = \$10

. Total profit =

\$10 \times 10 = \$100

Because price exceeds average total cost at the profit-maximizing output (

MR = MC

), the firm is making positive economic profit (supernormal profit) in the short run.

Analyze structural features and market dynamics

Free entry allows new rival firms selling differentiated substitute products to enter the market.

Monopolistic competition has freedom of entry and exit, so short-run economic profits attract new market entrants.

Evaluate long-run adjustment mechanism

The demand (average revenue) curve facing the incumbent firm shifts to the left and becomes more elastic.

As buyers spread their purchases across a wider variety of substitute brands, individual firm demand decreases until the demand curve becomes tangent to the average total cost curve (

P = ATC

), eliminating economic profit.

Key Concept

Short-run to long-run adjustment in monopolistic competition

Question 71Question →

Fast-food outlets and retail clothing shops frequently attempt to distinguish their goods from rival sellers using distinct packaging, brand names, and customer service styles. Which primary feature of monopolistic competition does this practice illustrate?

Product differentiation

Mutual interdependence

Price discrimination

Homogeneous output

Show answer & explanation

Answer: Product differentiation

Answer

Product differentiation

Product differentiation refers to the strategies firms use—such as unique branding, packaging, physical differences, and customer service—to make their products stand out from close substitutes. This gives each firm a downward-sloping demand curve for its specific product variant.

Step-by-Step Solution

Identify the scenario characteristics described in the question stem.

Firms are using packaging, branding, and service styles to make their products distinct from rivals.

Understanding seller behavior helps categorize the market feature.

Relate these characteristics to market structure concepts.

Creating real or perceived differences among similar substitute goods defines product differentiation under monopolistic competition.

Product differentiation gives firms a degree of market power over their specific brand variant.

Key Concept

Product Differentiation in Monopolistic Competition

Estimated Time:45s

Question 72Question →

Match each degree of price discrimination with its corresponding pricing strategy or market characteristic.

Click a left item, then click its matching right item

Show answer & explanation

Answer

First-degree price discrimination matches with charging each consumer the maximum price they are willing to pay; Second-degree price discrimination matches with charging different prices based on quantity blocks consumed; Third-degree price discrimination matches with charging different prices to distinct consumer groups based on price elasticity of demand.

First-degree price discrimination extracts all consumer surplus by charging individual maximum willingness to pay, second-degree varies rates according to quantity blocks purchased, and third-degree segments different consumer groups based on price elasticity of demand.

Step-by-Step Solution

Identify the characteristic of first-degree price discrimination

First-degree price discrimination captures maximum willingness to pay for each unit.

This form of pricing leaves zero consumer surplus for buyers.

Identify the characteristic of second-degree price discrimination

Second-degree price discrimination relies on pricing schedule variations by consumption blocks.

Prices decline as consumption volume increases across pre-set tiers.

Identify the characteristic of third-degree price discrimination

Third-degree price discrimination divides consumers into identifiable sub-markets.

Groups with relatively inelastic demand are charged higher prices, while groups with elastic demand receive lower prices.

Key Concept

Degrees of Price Discrimination

Question 73Question →

Which of the following factors is responsible for giving a monopolistically competitive firm some degree of price-making power, resulting in a downward-sloping demand curve?

Product differentiation that creates consumer brand loyalty

Strategic interdependence among a small group of dominant sellers

High structural barriers to entry that prevent market access

Complete price-taking behavior due to homogeneous goods

Show answer & explanation

Answer: Product differentiation that creates consumer brand loyalty

Answer

Product differentiation that creates consumer brand loyalty

Product differentiation allows firms to distinguish their products via branding, packaging, quality, or service. This generates brand loyalty, giving each seller partial control over price and making the firm's demand curve downward-sloping.

Step-by-Step Solution

Identify the defining feature of monopolistic competition

Monopolistic competition is characterized by many sellers offering differentiated products.

Product differentiation establishes real or perceived distinctions among rival products in the market.

Examine the effect of product differentiation on demand elasticity

Because products are differentiated, consumers form brand preferences, allowing a seller to raise price slightly without losing all customers.

This market power causes the individual firm's demand (Average Revenue) curve to be downward-sloping rather than perfectly elastic.

Key Concept

Product Differentiation and Pricing Power in Monopolistic Competition

Estimated Time:1m 0s

Question 74Question →

In a monopolistically competitive market, which feature ensures that firms earn only normal profit in the long run?

High structural barriers preventing new sellers from entering the industry

Marginal revenue being equal to market price at all output levels

Freedom of entry into and exit from the industry

Price rigidity caused by rival firm interdependence on a kinked demand curve

Show answer & explanation

Answer: Freedom of entry into and exit from the industry

Answer

Freedom of entry into and exit from the industry ensures that monopolistically competitive firms earn only normal profits in the long run.

In monopolistic competition, the absence of major entry barriers allows new firms to enter the market whenever existing firms earn short-run supernormal profits. The arrival of new firms introducing close substitute products reduces demand for each individual firm's product until average revenue equals average total cost, leaving sellers with only normal profit in the long run.

Step-by-Step Solution

Identify short-run profits and market entry conditions

In the short run, firms can earn supernormal (economic) profit. Because barriers to entry are low, these profits attract new sellers into the industry.

Understanding how incentives drive market dynamics.

Determine the impact of entry on firm demand and long-run profits

As new substitute products enter the market, the demand curve facing each individual firm shifts leftward until demand is tangent to average total cost (

P = ATC

), resulting in normal profit.

Free entry increases available substitutes and divides market demand among more sellers.

Key Concept

Long-run equilibrium and free entry in monopolistic competition

Question 75Question →

Which of the following characteristics distinguishes a pure monopoly from a firm operating under perfect competition?

The firm faces a downward-sloping demand curve where marginal revenue is less than price

The firm maximizes profit at the output level where marginal revenue equals marginal cost

The firm sets its output price equal to marginal revenue at all levels of production

The firm charges a higher price in the sub-market where price elasticity of demand is higher

Show answer & explanation

Answer: The firm faces a downward-sloping demand curve where marginal revenue is less than price

Answer

The firm faces a downward-sloping demand curve where marginal revenue is less than price.

A monopolist is the sole supplier in the market and faces the downward-sloping market demand curve. To increase output, the firm must reduce the price on all units sold, causing marginal revenue to be strictly less than price (

MR < P

). In perfect competition, the firm faces a horizontal demand curve where price equals marginal revenue (

P = MR

Step-by-Step Solution

Analyze the demand and revenue conditions of a monopolist versus a competitive firm

A perfectly competitive firm faces a perfectly elastic horizontal demand curve where price equals average revenue and marginal revenue (

P = AR = MR

). In contrast, a monopolist faces the market's downward-sloping demand curve (

P = AR > MR

Because a monopolist must lower the price of all previous units to sell an additional unit of output, the marginal revenue derived from selling one more unit is always less than the price.

Compare market structure equilibrium rules to identify the distinguishing feature

Both competitive firms and monopolies maximize profits where

MR = MC

, but only under monopoly is price greater than marginal revenue (

P > MR

The condition

MR < P

reflects the monopolist's market power to act as a price maker.

Key Concept

Monopoly Demand and Revenue Relationships

Question 76Question →

A firm operating under monopolistic competition faces an inverse demand function $P = 120 - 4Q$ and a marginal revenue function $MR = 120 - 8Q$ , where $P$ is price in Naira and $Q$ is quantity of output. Its total cost function is $TC = 200 + 20Q + Q^2$ and its marginal cost function is $MC = 20 + 2Q$ . What is the firm's maximum short-run economic profit in Naira?

Show answer & explanation

Answer: 300

Answer

The firm's maximum short-run economic profit is 300 Naira.

The profit-maximizing condition for a monopolistically competitive firm is

MR = MC

. Setting

120 - 8Q = 20 + 2Q

yields

Q = 10

units. Substituting

Q = 10

into the demand function gives a price of

80

Naira, producing Total Revenue of

800

Naira (

80 \times 10

). Substituting

Q = 10

into the Total Cost function yields

500

Naira (

200 + 200 + 100

). Short-run economic profit is

TR - TC = 800 - 500 = 300

Naira.

Step-by-Step Solution

Equate Marginal Revenue (MR) to Marginal Cost (MC) to find the profit-maximizing output

120 - 8Q = 20 + 2Q \implies 10Q = 100 \implies Q = 10

units

Like all imperfectly competitive firms, a monopolistically competitive firm maximizes profit at the output level where marginal revenue equals marginal cost.

Determine the price using the demand curve at the optimal output level

P = 120 - 4(10) = 80

Naira

The demand curve indicates the maximum price per unit consumers are willing to pay for 10 units.

Calculate Total Revenue (TR) and Total Cost (TC)

TR = 80 \times 10 = 800

Naira and

TC = 200 + 20(10) + 10^2 = 500

Naira

Total revenue is price multiplied by quantity produced, while total cost is evaluated directly from the given total cost equation.

Subtract Total Cost from Total Revenue to determine short-run economic profit

Economic profit

= 800 - 500 = 300

Naira

Economic profit represents the excess of total revenue over total economic cost in the short run.

Key Concept

Short-Run Profit Maximization in Monopolistic Competition

Question 77Question →

A single major mining corporation is the sole buyer of labor services in a remote industrial town. Which market structure best describes this buyer-dominated market?

Monopoly

Monopsony

Oligopoly

Perfect competition

Show answer & explanation

Answer: Monopsony

Answer

The market structure is a monopsony because there is only one buyer controlling the demand for labor in the market.

A market dominated by a single buyer is defined in economics as a monopsony. When a single firm is the sole employer of labor in a region, it possesses monopsony power over wage setting and employment levels.

Step-by-Step Solution

Identify the market participant controlling the market in the scenario.

The scenario describes a single mining corporation acting as the sole employer (buyer of labor).

Determining whether power lies on the supply (seller) or demand (buyer) side defines the market structure classification.

Apply economic taxonomy to match a single buyer market structure.

A market with a single buyer facing many competing suppliers/workers is defined as a monopsony.

Monopsony specifically addresses monopsonistic buyer power in input or factor markets.

Key Concept

Monopsony Market Structure

Question 78Question →

Compared to a perfectly competitive market, why does a profit-maximizing monopoly lead to a reduction in consumer welfare?

It restricts output and charges a price that exceeds marginal cost.

It produces at the minimum point of its average total cost curve in the long run.

It sets its price equal to marginal revenue to ensure allocative efficiency.

It eliminates deadweight loss by setting price equal to marginal cost.

Show answer & explanation

Answer: It restricts output and charges a price that exceeds marginal cost.

Answer

A monopoly reduces consumer welfare because it restricts total market output and charges a price that exceeds marginal cost.

A monopoly reduces consumer welfare because it exercises market power to restrict production level below the competitive equilibrium. By charging a price higher than marginal cost (

P > MC

), the monopolist creates deadweight loss, reducing overall consumer surplus.

Step-by-Step Solution

Identify the efficiency condition under perfect competition.

In perfect competition, firms produce where price equals marginal cost (

P = MC

), maximizing consumer surplus and total economic welfare.

Allocative efficiency occurs when price reflects the marginal valuation of consumers relative to the marginal cost of production.

Analyze the pricing and output behavior of a monopoly.

A monopolist sets output where marginal revenue equals marginal cost (

MR = MC

), but because demand slopes downward, price exceeds marginal cost (

P > MC

Market power enables the firm to restrict output to raise prices and maximize economic profit.

Evaluate the impact on consumer welfare.

Because output is lower and price is higher under monopoly than under competition, a portion of consumer surplus is lost and deadweight loss is created.

Consumer welfare drops due to under-allocation of resources relative to social optimum.

Key Concept

Monopolistic Inefficiency and Welfare Loss

Estimated Time:45s

Question 79Question →

Match each market efficiency concept on the left with its defining market condition or outcome on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Allocative Efficiency matches with 'Achieved when price equals marginal cost (

P = MC

)'; Productive Efficiency matches with 'Achieved when output is produced at the minimum point of average total cost (

P = \text{min } ATC

)'; Excess Capacity matches with 'Operates to the left of the minimum average cost output level in long-run equilibrium'; Monopoly Deadweight Loss matches with 'Loss of consumer and producer surplus caused by restricting output below the competitive level'.

Each concept correctly maps to its defined economic criterion: Allocative efficiency is defined by

P = MC

, productive efficiency by

P = \text{min } ATC

, excess capacity by producing below minimum

ATC

capacity, and deadweight loss by the loss of welfare due to monopoly restriction.

Step-by-Step Solution

Identify the criteria for economic efficiency.

Allocative efficiency requires

P = MC

so consumer valuation matches cost of production. Productive efficiency requires producing at minimum average total cost (

P = \text{min } ATC

These are standard efficiency benchmarks in market structure comparison.

Identify non-competitive market outcomes.

Monopolistic competition results in excess capacity as firms produce below minimum

ATC

. Monopoly causes deadweight loss due to output restriction.

Imperfect markets create inefficiencies relative to perfect competition.

Key Concept

Economic Efficiency and Welfare Criteria across Market Structures

Question 80Question →

Why do firms operating in a non-collusive oligopoly often prefer non-price competition, such as heavy advertising, over price cuts?

Price cuts are likely to be matched by rivals, triggering price wars without significantly expanding market share

Price increases are always followed by competitors to maintain industry price parity

Demand is completely inelastic for any price changes above the prevailing market price

Marginal revenue remains constant across all output levels in oligopolistic markets

Show answer & explanation

Answer: Price cuts are likely to be matched by rivals, triggering price wars without significantly expanding market share

Answer

Firms in a non-collusive oligopoly prefer non-price competition because price cuts are matched by competitors, leading to price wars that reduce industry profits rather than increasing individual market share.

In a non-collusive oligopoly, mutual interdependence implies that any price reduction by one firm will be promptly matched by rival firms to defend their market share. Consequently, price cuts do not yield a significant gain in sales volume and instead trigger price wars that reduce revenues for all participants. Firms therefore rely on non-price competition such as advertising, packaging, and brand loyalty.

Step-by-Step Solution

Analyze firm behavior under non-collusive oligopoly and mutual interdependence

Firms recognize that their pricing actions directly provoke reactions from rival firms.

Mutual interdependence dictates that any aggressive price reduction will be mirrored by competitors seeking to retain their customer base.

Evaluate the consequence of matching price cuts vs. non-price strategies

Price reductions lead to a downward spiral of price wars, whereas non-price competition (advertising, branding) shifts customer preferences without provoking price wars.

Non-price competition allows firms to gain market share or build customer loyalty while maintaining price stability.

Key Concept

Price Interdependence and Non-Price Competition in Oligopoly

Estimated Time:45s

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