Unit 7: Oligopoly - Subjective Questions

Oligopoly is a market structure characterized by a small number of large firms that dominate the market for a product. The word is derived from the Greek words oligos (few) and polein (to sell), meaning 'competition among the few'.

Key features:

• Few sellers: A handful of firms control the bulk of market supply.
• Interdependence: Each firm's decisions on price and output depend on the reactions of rivals.
• Barriers to entry: New firms find it difficult to enter.
• Product nature: Products may be homogeneous (pure oligopoly, e.g., cement, steel) or differentiated (differentiated oligopoly, e.g., automobiles).
• Indeterminate demand curve: Because of unpredictable rival reactions.
• Non-price competition: Firms rely heavily on advertising and product differentiation.

Oligopoly lies between monopoly and monopolistic competition and is the most common form of real-world market structure.

Oligopoly arises due to several barriers that limit the number of firms in an industry:

• Economies of scale: Large-scale production lowers average cost, so only a few big firms can survive profitably.
• Huge capital requirements: Setting up plants requires enormous investment, discouraging new entrants.
• Control over raw materials: A few firms may own key inputs or resources.
• Patents and licences: Legal rights over technology restrict entry.
• Mergers and takeovers: Consolidation reduces the number of independent firms.
• Brand loyalty and heavy advertising: Established firms create customer attachment that is costly to overcome.
• Government policy/regulation: Licensing requirements can restrict entry.
• Natural growth and market limitation: A limited market size supports only a few efficient firms.

These sources create strong entry barriers, allowing a few firms to dominate.

The distinctive features of oligopoly are:

• Few dominant firms: A small number of firms account for most industry output.
• Mutual interdependence: Each firm must anticipate rivals' reactions before setting price or output. This is the most important feature.
• Indeterminate/kinked demand curve: Price rigidity results because firms fear the reactions of rivals.
• Barriers to entry: Economies of scale, capital, patents restrict new entry.
• Non-price competition: Firms compete through advertising, branding, and product features rather than price cuts.
• Price rigidity: Prices tend to be sticky and stable over long periods.
• Group behaviour: Firms may collude (form cartels) or follow a leader.
• Nature of product: May be homogeneous or differentiated.
• Advertising importance: Heavy promotional expenditure is common.

These features distinguish oligopoly from perfect competition and monopoly.

Pure (Perfect) Oligopoly:

• Firms produce a homogeneous/identical product.
• Buyers see no difference between products.
• Competition is mainly on price and output.
• Examples: cement, steel, aluminium, chemicals.

Differentiated (Imperfect) Oligopoly:

• Firms produce differentiated products that are close but not perfect substitutes.
• Differentiation may be real or perceived (brand, design, quality).
• Competition is largely non-price (advertising, branding).
• Examples: automobiles, soft drinks, smartphones, toothpaste.

Both share the core features of few firms and interdependence.

Interdependence means that in an oligopoly, each firm's actions (regarding price, output, advertising, product design) directly affect its rivals, who then react.

Why it is central:

• With few firms, one firm's decision noticeably impacts market share and profits of others.
• A firm cannot decide independently; it must anticipate and account for competitors' likely reactions before acting. This is called conjectural variation.
• Example: If Firm A cuts price, rivals lose customers and are likely to cut prices too, potentially triggering a price war that hurts everyone.
• Because reactions are uncertain, the demand curve becomes indeterminate, making price and output decisions strategic.

Consequences of interdependence:

• Leads to price rigidity (kinked demand curve).
• Encourages collusion (cartels) to avoid harmful competition.
• Promotes non-price competition.

Thus interdependence shapes almost all behaviour in oligopoly, making it the defining characteristic.

A cartel is a formal agreement among oligopoly firms to coordinate their decisions on price, output, or market sharing in order to act collectively as a single monopolist and maximize joint profits.

Meaning of cartelization:

• Firms give up independent decision-making and follow a common policy through a central agency or board.
• It is a form of perfect (open) collusion.
• A well-known example is OPEC (oil-producing countries).

Objectives of a cartel:

• Maximize joint (industry) profits by acting like a monopoly.
• Eliminate price competition and avoid destructive price wars.
• Restrict output to raise prices.
• Share markets and allocate quotas among members.
• Restrict entry of new firms.
• Achieve price stability and reduce uncertainty.

By colluding, firms convert an uncertain oligopoly situation into a controlled, profit-maximizing arrangement.

In a centralized cartel, member firms surrender their price and output decisions to a central board, which behaves like a multi-plant monopolist.

Procedure for profit maximization:

• The board treats the total demand for the product as the market demand curve, giving a joint Marginal Revenue (MR) curve.
• It computes the industry Marginal Cost (MC) by horizontally summing the MC curves of all member firms.
• Total profit is maximized where:
  
• This determines the total industry output and the corresponding cartel price (read from the demand curve).

Allocation of output among firms:

• Output is distributed so that each firm produces where its own MC equals the common industry MR:
  
• This ensures the total output is produced at minimum cost, maximizing joint profit.

Profit sharing: Profits are pooled and distributed by agreement (often by quota).

The result mimics monopoly: higher price and lower output than under competition.

Centralized (Joint-Profit-Maximizing) Cartel:

• A central authority takes all decisions on price and output.
• Firms behave like a single monopolist.
• Output is allocated to minimize total cost; profits are pooled and shared.
• Requires high coordination.

Market-Sharing Cartel:

• Firms agree to divide the market among themselves but retain some independence.
• Two common methods:
  • Non-price competition agreement: Firms fix a common price and compete only through non-price means; each keeps its own profits.
  • Quota/regional sharing: Firms are assigned sales quotas or exclusive territories.

Both aim to reduce competition, but the market-sharing form allows greater firm independence.

Factors favouring cartel success:

• Small number of firms making agreement easier.
• Homogeneous product, so a single price can be set.
• Inelastic demand for the product, allowing profitable price rises.
• High barriers to entry preventing outsiders from undercutting.
• Legal permissibility and strong enforcement mechanisms.
• Stable market conditions and similar cost structures.

Factors causing cartels to break down:

• Incentive to cheat: Each member can gain by secretly cutting price or exceeding its quota (the prisoner's dilemma).
• Differences in costs make agreement on a common price difficult.
• Large number of firms complicates coordination and monitoring.
• Entry of new firms attracted by high profits erodes cartel power.
• Product differentiation makes a uniform price hard.
• Business recession/falling demand intensifies pressure to cut prices.
• Legal restrictions (anti-trust laws) make cartels illegal in many countries.

The constant temptation to defect makes most cartels inherently unstable.

In a cartel, members agree to restrict output and charge a high monopoly price. However, each firm faces a strong temptation to cheat.

Reason for cheating:

• At the high cartel price, each firm's marginal revenue exceeds its marginal cost.
• A single firm can secretly lower its price slightly or produce beyond its quota to capture more sales, earning extra profit while others maintain the high price.
• Since it is one of many, its extra output has little effect on the overall market price initially.

Prisoner's dilemma framework:

• Each firm's dominant strategy is to cheat, regardless of what others do:
  • If others honour the agreement, cheating brings extra profit.
  • If others cheat, honouring the agreement means losing market share.
• When all firms cheat, prices fall and joint profits collapse, leaving everyone worse off than if they had cooperated.

This strategic conflict between collective interest (cooperate) and individual interest (cheat) is the core reason cartels are unstable and tend to break down without strong enforcement.

Price leadership is a form of tacit (informal) collusion in oligopoly where one firm (the leader) sets the price and the other firms (followers) adopt and follow that price without a formal agreement.

Meaning:

• It avoids the risks of open collusion (which may be illegal) while still coordinating prices.
• The leader is usually the most powerful, largest, or lowest-cost firm.

Types of price leadership:

• Price leadership by the low-cost firm: The firm with the lowest cost sets a price acceptable to others; higher-cost firms follow.
• Price leadership by the dominant (large) firm: A firm with a large market share sets the price; small firms behave as price takers.
• Barometric price leadership: A firm (not necessarily the largest) that is skilled at reading market conditions initiates price changes; others follow because it accurately reflects industry conditions.
• Exploitative/aggressive leadership: A powerful firm forces its price on rivals, sometimes threatening price wars.

Price leadership helps maintain price stability and avoids destructive competition.

In the low-cost firm price leadership model, the firm with the lower cost of production becomes the leader and sets the price, which the higher-cost rival(s) must follow.

Assumptions:

• Two firms (A = low-cost leader, B = high-cost follower).
• Identical product and equal market share (each faces the same demand curve, half of market demand).
• Same demand and MR curves for both firms.

Determination:

• Both firms face the same demand curve and marginal revenue curve .
• Firm A (low cost) has below Firm B's .
• Each firm's own profit-maximizing price differs:
  • Firm A maximizes where giving a lower price .
  • Firm B maximizes where giving a higher price .
• The low-cost firm A prefers the lower price . Since it can afford it, A sets .
• Firm B is forced to accept , because charging the higher price would lose customers.

Result: The low-cost firm becomes the leader, sets the lower price, and the high-cost firm follows and earns less-than-maximum profit but avoids losing the market.

In the dominant firm model, one large firm supplies a major share of the market while several small firms act as a competitive fringe. The dominant firm sets the price, and small firms behave as price takers.

Working of the model:

• The dominant firm knows the total market demand () and the supply of small firms (their combined MC/supply curve).
• It derives its own demand curve by subtracting the supply of small firms from total market demand at each price:
  
• From this residual demand curve, the dominant firm obtains its marginal revenue (MR) curve.
• It maximizes profit where:
  
• This determines the dominant firm's output and the market price.
• At this set price, the small firms supply whatever quantity they wish (up to where their MC = price), and the dominant firm supplies the remainder of market demand.

Result: The dominant firm acts like a partial monopolist over its residual demand, while small firms adjust output to the leader's price. This ensures price coordination without formal collusion.

Barometric price leadership is a form of price leadership where a particular firm (not necessarily the largest or lowest-cost) acts as a 'barometer' of market conditions. It initiates price changes that accurately reflect changes in costs and demand, and other firms follow because they trust its judgment.

Features of barometric leadership:

• The leader is often a respected, experienced, or well-informed firm.
• Its price changes are seen as reasonable responses to industry conditions (cost changes, demand shifts).
• Followers accept the change voluntarily, not out of fear.
• Leadership may rotate among firms over time.

Difference from dominant firm leadership:

Barometric leadership is essentially coordination through information, whereas dominant firm leadership rests on market power.

Both cartels and price leadership are ways firms coordinate to reduce competition, but they differ in formality and structure.

Cartel (Formal/Open collusion):

• Involves an explicit, formal agreement among firms.
• A central body may fix price, output, and market shares.
• Aims at joint profit maximization.
• Often illegal under anti-trust laws.
• Example: OPEC.

Price Leadership (Tacit/Informal collusion):

• No formal agreement; coordination is implicit.
• One firm sets the price; others voluntarily follow.
• Aims at price stability and avoiding price wars.
• Harder to prosecute since there is no explicit agreement.
• Example: leading firms in steel, cars.

Both reduce uncertainty from interdependence, but cartels involve tighter, formal control.

Although price leadership helps coordinate prices, it faces several difficulties:

• Difference in cost structures: Follower firms with lower costs may resent following a high-cost leader's price and may break away.
• Product differentiation: When products differ, a single price set by the leader may not suit all firms.
• Incentive for followers to cheat: Followers may offer secret discounts, credit terms, or extra services to gain market share.
• Determining the right price: The leader may misjudge market conditions, leading to inappropriate prices.
• Non-price competition: Followers may compete through advertising and quality even while accepting the leader's price.
• Rivalry for leadership: More than one firm may want to be the leader, causing conflict.
• Entry of new firms: New entrants may not accept the leader's price.
• Loss of market share by leader: If the leader sets too high a price, followers gain sales at its expense.

These issues make price leadership fragile and difficult to sustain over the long run.

Price rigidity refers to the tendency of prices in oligopoly to remain sticky and stable over long periods, even when costs or demand change.

Reasons for price rigidity:

• Fear of price war: If a firm cuts price, rivals match it (to avoid losing customers), so the firm gains little but everyone earns less. If a firm raises price, rivals do not follow, and the firm loses customers. Hence firms keep prices unchanged.
• Kinked demand curve: The demand curve has a kink at the prevailing price — elastic above (price rise not followed) and inelastic below (price cut followed). This produces a discontinuous (gap in) MR curve, so cost changes within the gap do not alter the profit-maximizing price:
  
• Desire for stability: Firms value stable, predictable conditions and avoid disturbing the market.
• Tacit understanding/price leadership: Firms informally maintain existing prices.
• High cost of frequent price changes: Changing prices (menu costs, customer confusion) is costly.

Thus, interdependence and fear of adverse rival reactions keep oligopoly prices rigid.

Advantages of oligopoly:

• Economies of scale: Large firms produce efficiently, lowering costs and potentially prices.
• Innovation and R&D: High profits enable heavy investment in research and new products.
• Product improvement and variety: Non-price competition leads to better quality and features.
• Price stability: Rigid prices give consumers predictability.
• Competition benefits: Rivalry can spur efficiency and better service.

Disadvantages of oligopoly:

• Higher prices and lower output: Collusion (cartels) can raise prices toward monopoly levels, harming consumers.
• Wasteful advertising: Excessive promotional spending raises costs.
• Restricted entry: Barriers protect existing firms from competition.
• Exploitation of consumers: Through collusion and price coordination.
• Inefficiency: Output may be below socially optimal levels; possible allocative inefficiency.
• Risk of price wars: Destructive competition can occur when collusion breaks.

Conclusion: Oligopoly can deliver scale and innovation benefits but risks consumer exploitation and inefficiency, which is why it is often subject to regulation and anti-trust laws.

Non-price competition refers to firms competing for customers through means other than lowering price, such as advertising, branding, product quality, packaging, after-sales service, and promotional schemes.

Forms of non-price competition:

• Advertising and publicity to build brand image.
• Product differentiation through design, features, and quality.
• After-sales service, warranties, and guarantees.
• Discounts, gifts, and loyalty schemes (non-price incentives).
• Attractive packaging and better distribution.

Why firms prefer non-price competition:

• Avoids price wars: Price cuts are easily matched by rivals, hurting all firms; non-price methods are harder to imitate quickly.
• Builds brand loyalty: Differentiation creates a captive customer base that is less price-sensitive.
• Protects profit margins: Firms can compete without sacrificing price levels.
• Sustainable advantage: Reputation and brand equity provide longer-lasting benefits than temporary price cuts.
• Consistent with price rigidity: Since prices tend to be sticky, competition naturally shifts to non-price dimensions.

Thus, interdependence and the danger of price wars push oligopolists toward non-price competition.

Both are forms of imperfect competition, but they differ significantly:

Oligopoly:

• Few firms dominate the market.
• Strong interdependence — each firm considers rivals' reactions.
• High barriers to entry.
• Products may be homogeneous or differentiated.
• Price rigidity and possibility of collusion (cartels, price leadership).
• Individual firms have significant market power.

Monopolistic Competition:

• Large number of firms, each small relative to the market.
• Little or no interdependence — a firm ignores rivals' reactions.
• Low/free barriers to entry and exit.
• Products are differentiated (close substitutes).
• Prices are more flexible; no collusion.
• Firms have limited market power; only normal profit in the long run.

The key difference is the degree of interdependence and market power arising from the number of firms.