Lecture 3 - Market and Competitive Analysis Flashcards
(38 cards)
Define the terms:
Direct Competitors
Indirected Competitors
Direct competitors: Strategic choice of one firm directly affects the performance of the other.
Indirect competitors: Strategic choice of one firm affects the performance of the other because of a strategic reaction by a third firm.
What is industry concentration?
- Concentration measures the extent to which a few firms control an industry.
- Other things being equal, a market is said to be more concentrated
- the fewer the number of firms in production, or
- the more unequal the distribution of market shares.
- Unilateral or coordinated action to increase prices and lower output - ( so firms decide together how to increase/lower prices for their general benefit)
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Explain the concentration ratio (CRr).
- The goverment doesn’t like firms having really large concentration ratios so if firms are to buy a new business they have to sell off another part to keep the same market share. (called competition commission must be informed).

Explain the Herfindahl index

What attributes are used to indintify if other firms are competitors or not?
- In practice anyone who produces a substitute product is a competitor
- Two products tend to be close substitutes when
- they have similar performance characteristics
- they have similar occasion for use and
- they are sold in the same geographic area
What are issues of studying competition using SIC codes.
- Based of a manufacturing industry based world where different firms produced different products.
- However, companies such as amazon are branching out into different industries meaning based on the SIC codes they aren’t taking too much of a market share but overall they are taking a hugo percentage.
- Technology developments blurring industry borders.
- SIC = standard industry classification
What are the four classes of market structure?
Give each class the Herfindahls measure and the intensity of price competition experienced.

What are the assumptions behind a perfectly competitive market?
- Large (theoretically infinite) number of consumers and suppliers each with an insignificant share of market
- Each firm is too small to affect price via a change in market supply - each individual firm is assumed to be a price taker
- Identical output produced by each firm – homogeneous products that are perfect substitutes for each other (Consumers perceive the products to be identical)
- Consumers have perfect information about the prices all sellers in the market charge
- All firms (industry participants and new entrants) have equal access to resources (technology, other factor inputs)
- No barriers to entry & exit of firms
What is the point of the model of a perfectly competitive market, when it never really exists?
The model provides a theoretical benchmark against which we compare and contrast imperfectly competitive markets - point of reference
Draw the competitive firms demand curve.

Illustrate profit-maximisation in perfect competition. (Draw a graph)
(remember this is the firms short term goal because in reality perfetly competition price is driven down to Price = ATC)

What is a monopoly?
- Monopoly is the extreme opposite of perfect competition – just a single supplier.
- In most industries the situation lies between perfect competition and monopoly, but firms try to create monopolistic positions.
- Key characteristic of monopoly is that the market for the firm and the industry demand are the same thing. - because monopoly is the only firm in the market
- Monopolist will equate its MC curve with the market MR curve to get to a position of maximum profits.
Illustrate how monopolies try to maximise profits.
- Monopolies reduce supply and increase price to maximise their profits (point of minimum MC) in expense of the customers. This is why the government wants to make sure there is sufficient competiton in the market place.

What are reasons for/against monopolies?
-
Against
- The standard case against a monopoly is that these businesses can earn abnormal profits at the expense of economic efficiency
- The monopolist is extracting a price from consumers that is above the cost of resources used in making the product
- There is a deadweight loss as the price of the product increases and is being under-consumed.
-
For
- However, monopolist might be more innovative and hence benefit the consumer.
- Look at Google -> giving them monopoly power -> leads to innovation and new products and services.
Illustrate and explain the U-shape relationship between innovation and competition.
- Escape Competition Effect:
- innovate more to escape the competition.
- Schumpeterian effect:
- Even if firms innovates these will be dissipated away by competitors (e.g. copying or coming up with better innovations) and hence incentive to innovate declines.

What are the features of an oligopoly market.
- A market dominated by a few large firms i.e. “Competition amongst the few”
- High level of market concentration
- Entry barriers exist – long run supernormal profits
- Mutual interdependence between competing firms i.e. the price and output decisions of one firm affects itself and others
- Intensive non-price competition is a common feature of oligopoly
- Periodic aggressive price wars (fights for market share /dominance)
- Strong tendency for many market structures to tend towards oligopoly in the long run - Coke and Pepsi an example of oligopoly
Explain the prisonners dilemma in duopolys.
- The optimum solution is for both firms to sell at £200 (Nash equilibrium) this means no other firms will come and try to undercut them.
- Parato Optimum: both firms would have been maximum profits setting at £300 together. (could lead to outside firms undercutting them.)

Explain the cournot model is and its assumptions.
- The assumption of the Cournot model is that each firm maximises its profit on the assumption that the other firm’s output is fixed.
- Each firm chooses a quantity of output instead of a price.
- In choosing an output, each firm takes its rival’s output as given.
- In the Cournot model each of the two firms pick the quantities Q1 and Q2 to be produced
- The price that emerges clears the market (demand = supply)
In a Cournot Duopoly explain how the reaction function of one of the firms is derived.

Illustrate the Cournot equilibrium for two firms. (Draw a graph)

Explain how the Cournot Model converges to perfect competition as the number of firms increase in the market.
- The output in Cournot equilibrium will be less than the output under perfect competition but greater than under joint profit maximising collusion
- In the Nash equilibrium of this general version of the Cournot model, firms fail to maximize their joint profit.
- Relative to joint profit maximisation, firms produce too much output in the Nash equilibrium (joint profit maximisation is when firms collude an act like a monopolist).
- With only one firm in the market, the Cournot-Nash equilibrium is the monopoly equilibrium.
- As the number of firms increases, output increases. As a result, price and aggregate oligopoly profits decrease.
- When there are infinitely many firms, the Cournot model is, in effect, the perfectly competitive model.
What is the Betrand paradox?
How is the paradox avoided?
- If the firms can adjust the output quickly, Bertrand type competition will ensue.
- In Bertrand competition two firms are sufficient to produce the same outcome as infinite number of firms
- The Bertrand model with two firms is perfectly competitive (The Bertrand paradox).
- The Betrand model will move away from a perfectly competitive model when we start relaxing assumptions one period to many periods, homogeneous products to product differentiation, fixed number of firms to entry/exits.
Define collusion (generally)
Collusion represents an attempt by firms to recognise their interdependence and act together rather than compete – seen as a move towards joint-profit maximization.
Define overt collusion
- Creation of a price fixing arrangement with a producer cartel responsible for allocating output / supply within the market (eg., OPEC)
