Monopolies and oligopolies Flashcards
(52 cards)
what is the nash equilibrium
a situation where all players in a game have chosen their best strategy, given the strategies of the other players
what is a dominant strategy
is where one single strategy is best for a player regardless of what strategy the other player in the game decides to use
impacts of game theory
- Strategic Decision Making
Game theory involves analyzing the strategic decisions of firms in an oligopoly or competitive market ⟶
Firms must consider rival firms’ actions and how they may respond to their own choices ⟶
This leads firms to make better-informed decisions based on potential outcomes ⟶
It encourages firms to think in terms of cooperation vs. competition to maximize their own payoffs.
- Collusion Possibility 💼🤝
In oligopolistic markets, game theory suggests that firms may cooperate rather than compete, leading to collusion ⟶
Firms recognize that working together to fix prices or output can maximize profits for all participants ⟶
Collusion reduces uncertainty in the market and can lead to higher prices and supernormal profits ⟶
However, this behavior is typically illegal and can be challenged by competition authorities.
Dynamic Competition and Innovation 🚀💡
Game theory can explain why firms may invest in innovation to outdo rivals ⟶
By anticipating that rivals will respond to new technology or products, firms may invest in R&D to gain a competitive advantage ⟶
This creates a dynamic competitive environment where firms must continually innovate to stay ahead ⟶
It encourages a cycle of improvement in products, services, and efficiency in the market.
Game theory helps explain the occurrence of price wars, especially in oligopolistic markets ⟶
Firms may engage in aggressive price competition to gain market share or force rivals to exit the market ⟶
This leads to short-term benefits (such as increased sales) but long-term losses (as prices decrease, profits are squeezed) ⟶
Eventually, firms may stop competing on price and shift to other strategies, such as non-price competition or collusion.
Kinked Demand Curve in Oligopolies 📉🔵
Game theory often explains the kinked demand curve in oligopolies, where firms expect price stability ⟶
Firms may be reluctant to raise prices because competitors won’t follow suit, resulting in lost market share ⟶
Conversely, lowering prices leads to price cuts by competitors, which neutralizes the advantage ⟶
This leads to a sticky price situation in oligopolistic markets where firms prefer non-price competition.
what is game theory
a theory that explores the reaction of one player to a change in strategy of another player
characteristics of an oligopoly
- few firms dominate the market
- high concentration ratio
- differentiated goods, so firms are price makers
- high barriers to entry and exists
- interdependence - firms make decisions based on the actions and reactions of rival firms
- price rigidity
- non price competition
- profit maximisation not the sole objective
meaning of high concentration ratio
when a group of firms share most ≈70% of market share
examples of oligopolies
- soft drink industry - pepsi,coke,sprite
- car industry - mercedez ,bmw
- supermarket - sainsburys,aldi,tescos
- airlines
- energy - SSE british gas etc
explain the kinked demand curve - interdependence
📉 Kinked Demand Curve (Explanation of Price Rigidity)
🔗 In an oligopoly, firms are highly interdependent — each firm’s pricing decision affects others
🔗 Firms assume that if they raise their prices, competitors won’t follow, causing a loss in market share
🔗 But if they lower their prices, competitors will follow to maintain their market share
🔗 This creates a kink in the demand curve at the current market price, causing price rigidity — prices don’t easily change even if costs change
- if a firm raises its price above market level, competitors are unlikely to follow, as they can increase market share by keeping prices stable
- competitors will shift to competitors offering lower prices, causing the original firm’s qd to fall disproportionately to the price increase
- if a firm decreases their price, qd will increase by a v small amount
- if a firm lowers its price, competitors are likely to match the reduction to protect their own market share
- the price matching diminishes the individual firms ability to attract more customers
- the demand curve is more inelastic at this point, as all firms in the market lower their prices, limiting the qd increase and reducing revenue for all firms
using the linked demand curve, explain why oligopolistic firms do not need to change prices
- firms aim to max profit at MC = MR
- if the MC curve shifts within the vertical gap in the MR curve:
- the profit maximising price and output remain unchanged, as there’s no unique MR to cross the new mc within the gap
- so even with minor changes in costs, firms don’t need to adjust prices to maintain profit maximisation
- so the price stays fixed despite cost fluctuations, contributing to price rigidity
conclusions from linked demand curve
1, price competition may still happen
- a firm may reduce prices to try and increase market share (even though this wouldn’t work)
- non price competition
- the kinked demand curve shows the drawbacks of price changes, leading firms to focus on non price factors such as product quality, branding, advertising etc
- as this is a safer way to differentiate and attract customers without risking profitability through lower prices - temptation to collude
- the stability suggested by the linked demand curve may make firms consider collusion to maximise profits collectively, as maintaining stable prices benefits all players
- collusion avoids the risks of price wars while ensuring higher collective profitability
what is overt collusion
where firms get together and agree to fix prices/quantity
what is tacit collusion
when there is no formal communication between firms, they follow prices set by price leader
what factors are likely to promote a competitive oligopoly
- if there are many firms - as organising collusion when there are a lot of firms is harder
- if new market entry is possible - then making huge supernormal profits by colluding together is not sustainable as it will only incentivise new firms to enter the market and take those profits
- if there is one firm with significant cost advantage - it makes it difficult to organise/fix prices
- if there are homogenous goods, then firms don’t have price making power
- saturated market - where there are a lot of price wars and price competition
factors that promote collusive oligopolies
- small number of firms - they can get together easily to fix prices
- if firms have similar costs
- high entry barriers- eg predatory pricing
- ineffective competition policy
- if there’s high consumer loyalty and consumer inertia means lower incentive to cheat
pros and cons of a competitive oligopoly
✅ Advantages of a Competitive Oligopoly
1. Lower Prices due to Price Competition :
Firms in a competitive oligopoly may engage in price wars to attract market share ⟶
This puts downward pressure on prices ⟶
Consumers benefit from cheaper goods and services ⟶
Leading to higher consumer surplus and real incomes.
- Dynamic Efficiency through Innovation:
Intense competition encourages firms to invest in R&D to gain a competitive edge ⟶
Leads to product innovation and technological advancements ⟶
Consumers enjoy better quality products and more variety ⟶
Contributes to long-term welfare improvements.
- Non-Price Competition Benefits Consumers :
Firms may compete through branding, customer service, and product differentiation ⟶
Enhances consumer experience and satisfaction ⟶
Allows for tailored goods/services to different preferences ⟶
Strengthens brand loyalty and engagement.
❌ Disadvantages of a Competitive Oligopoly
1. Tacit or Formal Collusion Risks
Even in competitive oligopolies, firms may collude (legally or illegally) to avoid price wars ⟶
This leads to artificially high prices and reduced competition ⟶
Consumer surplus falls, and allocative inefficiency rises ⟶
Mirrors monopoly-like outcomes.
- Wasteful Spending on Advertising
Non-price competition can result in huge marketing and branding expenses ⟶
These costs are often passed on to consumers through higher prices ⟶
Results in productive inefficiency ⟶
Resources may be misallocated away from investment and innovation.
- Market Power & Barriers to Entry
Existing oligopolies often use tactics like brand loyalty, patents, or limit pricing to deter new entrants ⟶
This reduces contestability and long-term competition ⟶
Can allow firms to retain abnormal profits even when inefficient ⟶
Results in reduced innovation and consumer harm.
- Price Rigidity – Kinked Demand Curve Model
Due to fear of price wars, firms may avoid changing prices, even when costs change ⟶
This leads to sticky prices and reduced responsiveness to economic conditions ⟶
Can result in inefficient market adjustments ⟶
Hurts both consumers and producers during inflation or recession.
cons of a competitive oligopolistic market
- Price Wars ⚔️
Firms in a competitive oligopoly may undercut each other to gain market share ⟶
This can lead to destructive price wars, reducing prices below cost ⟶
Firms may experience reduced profits, leading to cost-cutting or layoffs ⟶
Long-term investment and R&D may be sacrificed, harming innovation and quality.
- Excessive Non-Price Competition 💡
Firms may shift focus to non-price competition such as advertising and branding ⟶
This can increase costs without improving productive efficiency ⟶
Consumers may pay higher prices due to inflated marketing costs ⟶
Market resources are misallocated, moving away from true consumer welfare gains.
- Lack of Productive Efficiency ⚙️
Competitive oligopolies may not produce at the lowest point on their AC curve ⟶
Duplication of resources and underutilised economies of scale can occur ⟶
Higher average costs mean prices are not as low as they could be ⟶
Consumers lose out compared to a perfectly competitive market structure.
- Tacit Collusion Risk 🤝
Even in competitive oligopolies, firms may observe rivals’ behaviour and engage in tacit collusion ⟶
Prices remain stable and above marginal cost, limiting consumer benefit ⟶
Market resembles a quasi-monopoly, even with multiple firms ⟶
Consumer surplus is eroded as firms prioritise profits over price competition.
- Inefficient Outcomes Due to Strategic Behaviour 🎯
Firms may invest in limit pricing, capacity hoarding or lobbying to deter new entrants ⟶
These strategies consume resources that could be used productively ⟶
Such behaviour leads to static inefficiency and restricts innovation or market dynamism ⟶
Consumer choice and long-term market growth may suffer.
pros of a collusive oligopoly
- Higher Profits for Firms
Firms in a collusive oligopoly agree to fix prices or restrict output ⟶
Leads to higher prices and reduced competition ⟶
Firms achieve supernormal profits as a result ⟶
Profits can be reinvested for long-term growth and expansion.
- Price Stability
Collusive arrangements result in price stability over time ⟶
Reduces the likelihood of price wars that could destabilize the market ⟶
Consumers benefit from predictable prices ⟶
Businesses can plan and forecast revenues more accurately.
- Reduced Risk of Competition
Collusion limits competitive pressures in the market ⟶
Firms have less incentive to cut prices or innovate to attract customers ⟶
Leads to lower risks for firms in terms of market share loss ⟶
Firms can enjoy long-term market stability and secure their positions.
- Increased Market Power
Collusive firms gain greater control over the market ⟶
With collective market power, firms can influence supply and demand more effectively ⟶
This market control allows firms to set prices in their favour ⟶
Firms may be able to negotiate better terms with suppliers or other stakeholders.
cons of a collusive oligopoly
Allocative Inefficiency
- In a collusive oligopoly, firms often restrict output and set higher prices than they would in a competitive market (P > MC), leading to allocative inefficiency.
- Consumers face higher prices, which reduces overall welfare, as they are paying more than they would in a competitive market.
Reduced Innovation
- With less competition, firms may have less incentive to innovate or improve their products since they can achieve high profits without needing to differentiate.
- This leads to dynamic inefficiency, as firms do not invest in research and development to improve products or services, stifling technological advancement.
Risk of Regulatory Penalties
- Collusion is illegal in many countries and can attract heavy fines, penalties, and reputational damage if discovered.
- Firms may face legal and financial consequences, which can harm their long-term prospects and erode consumer trust in their products.
Reduced Consumer Choice
- Collusive behavior often leads to limited product variety as firms focus on maintaining high prices rather than offering diverse or improved products.
- Consumers face fewer options and are unable to choose products that better meet their preferences, reducing consumer welfare.
what is a cartel
a form of collusion between suppliers. it occurs when two or more firms enter into agreements to restrict market supply and thereby fix the price of a product in a particular industry
example of cartel
OPEC - oil
KLM - airline who got fined 127 million for price fixing in cargo sector
what is a monopoly
a single dominant seller in the market
CMA defines it as one firm having over 25% of market share
features of a monopoly
- differentiated products
- high barriers to entry/exit, so sustainable spn profits
- price makers
- imperfect information
- firms are profit maximisers
comment on efficiencies in a monopoly
- allocative efficiency not being reached, as P ≠ MC, price is greater than MC so they exploit consumers with higher prices and lower cs, they also restrict output
- productive efficiency not being reached, they are voluntarily forgoing (going without) economies of scale by not producing at the minimum point ofAC
- There is X inefficiency if they become complacent as they consistently make supernormal profits
so no static efficiency - dynamic efficiency can be reached as there are long run supernormal profits. there are high barriers to entry as well as imperfect information and this keeps new forms out of the market. the monopolist can reinvest back into the company in the form of tech etc
benefits of a monopoly (FOR A FIRM)
💰 Economies of Scale
🔗 A monopoly can achieve large economies of scale due to its dominant market share
🔗 With a bigger production scale, the firm can spread its fixed costs over more units, reducing average costs
🔗 This allows the monopoly to offer lower prices than smaller competitors, making the product more affordable for consumers
🔗 Over time, economies of scale can lead to higher efficiency and lower prices for consumers in the long run
🌱 Long-Term Investment in Innovation
🔗 Because monopolies face little competition, they can afford to make large investments in research and development (R&D)
🔗 With consistent revenue, they have the financial stability to fund long-term innovation and new product development
🔗 In the absence of competition, monopolies have the incentive to create cutting-edge technology or improve efficiency
🔗 This can lead to technological advancements and better quality products for consumers in the long run
Cross-subsidisation
- Monopoly firms can use profits from one profitable sector to subsidize losses in less profitable or loss-making sectors.
- This diversification helps the firm maintain market presence in multiple areas, contributing to its resilience and brand reputation.
Market Stability
- As the sole supplier, a monopoly can avoid price wars and instability associated with competition, allowing for predictable revenue streams.
- Stability supports long-term planning and investment, enabling the firm to focus on improving operations and expanding its market influence.
Price Discrimination
- Monopoly firms can engage in price discrimination, charging different prices to different consumer groups based on their willingness to pay. This maximizes revenue and profits.
- Higher profits from price discrimination can be reinvested into the firm, contributing to innovation and product development.