Chapter 25 – Monopolist Competition and Oligopoly
Monopolistic competition – a) relatively large number of sellers b) Differentiated products c) Easy entrance and exit from the economy
Relatively large number of sellers – maybe 25 – 70 but not the thousands as in complete competition
No Collusion – enough firms that price setting/collusion is improbable
Independent action – No feel of interdependence, if one firm lowers prices, another one wouldn’t feel much of an effect
Differentiated Products – unlike pure competition, the products differ slightly by…Product Attributes, Service, Location (of purchase), Brand names and packaging – advertising and brand loyalty, Some Control over price – Sellers may pay a little more to choose a brand they think is better so not completely price takers
Easy Entry and Exit – because the firms are relatively smaller, it is not as hard to raise capital or achieve economy of scale
Advertisements – the goal of advertising is to differentiate products and encourage non-price competition – to make price less of a factor
Price and Output in Monopolistic Competition
The firms demand curve – Elasticity of demand faced by a monopolistically competitive firm is highly elastic but not perfectly elastic. Elasticity of demand depends on the number of rivals and the degree of product differentiation
The short run: Profit or Loss – mazimize profit/minimize loss by making MC = MR
The Long Run: Only a Normal Profit – In the long run, a monopolistically competitive industry will earn only a normal profit
Profits: Firms enter – Economic profit attracts new rivals, because entry to the industry is relatively easy, as more firms join, the demand curve will fall until it is tangent to the ATC curve, at this point the firms only produce a normal profit so there is no incentive for new firms to enter the business
Losses: Firms leave – Short term losses will push some firms out of the business, this will shift the demand curve (of the individual firm) to the right and thus restore normal profits
Complications – if a firm has sufficient product differentiation such that they cannot be copied, then they may be able to sustain modest economic profits in the long run or it might not be quite as free to enter the market due to product differentiation
Monopolistic Competition and Efficiency – the equality of price and marginal cost yields allocative efficiency
Neither Productive nor allocative efficiency – neither productive nor allocative efficiency occurs in long-run equilibrium. Profit maximizing price exceeds the lowest averacte total cost, therefore, the firms ATC is higher than optimal from society’s perspective. Also the Profit maximizing price exceeds marginal cost meaning that monopolistic competition causes an underallocation of resources, therefore it is not allocatively efficient either. Monopolistic competitors must charge a higher than competitive price in the long run to achieve a normal profit
Excess Capability – the difference between the minimum-ATC and the profit-maximizing ATC
Product Variety
Benefits of Product Variety – Product variety and product improvement of monopolistic competition may offset the inefficiency
Further Complexity – Graph 25.1 assumes no product development/fixed level of advertising, Competitive firm juggles price, product and advertising – In practice, this is determined by trial and error
Oligopoly
A Few Large Producers – when only a few companies 3-5 are in competition
Homogenous or Differentiated Products – May be a homogenous oligopoly or a differentiated oligopoly depending on whether or not the products are differentiated
Control over Price, but Mutual Interdependence – Price maker but must be careful that rivals wont undercut them significantly.
Strategic behavior – self-interested behavior
Mutual interdependence – each firms profit also depends on the prices/advertising of the other firms
Entry Barriers
Hard to enter because of often high capital requirements and need for economy of scale
Mergers – while sometimes firms grow into a oligopoly, often it is done by mergers. Beneficial because it makes the firm more monopolist in nature
Measures of Industry Concentration
Concentration Ration – percentage of total output controlled by the largest firm, when the largest four firms control over 40% of a market, it is considered an oligopoly
Localized Markets – CR’s are for the whole nation, but you can have oligopolies on a smaller level
Interindustry Competition – Sometimes industries compete with each other; for example motorcycle market competes with car market
World Trade – Import competition from foreign markets
Herfindahl Index – It could be possible if 4 companies controlled the whole industry that the four-firm CR was equal to a monopolized industry, the H index is the squared percentage market shares of all firms in the industry
The greater the H I, the greater the market power in the industry
Oligopoly and game theory
The study of how people behave in strategic systems is called game theory
Mutual Interdependence – Each firms profit depends on their pricing strategies and those of their rivals, one rivals high price strategy will only be profitable if the other one employs a high price strategy and vice versa
Collusive Tendencies – Collusion – cooperation with rivals (ie keep prices up for both firms)
Incentive to cheat – incentive to break price setting because then they could dominate the market
Three Oligopoly Models
Diversity of oligopolies – Tight Oligopolies – 3 or 4 control almost all, or Loose – 6-7 control 70% or so
Complications of interdependence – Firms cannot predict reactions so they cannot predict profit maximizing prices
Kinkead-Demand Thory: Non collusive Oligopoly
Match Price changes – If Company B and C react to Company As price decrease by matching A’s prices exactly then Arch’s demand and marginal revenue curves will look like straight lines
Ignore price change – Demand and MR curves faced by A will be straight lines, A would gain sales at the expensive of the other two companies, if it raised prices, A would lose many customers but not all of them because of product loyalty
A combined strategy
It is rational that B and C would lower their prices – but not raise them if Price was raised
Noncollusive oligopolies face the kinked-demand curve
Price Inflexibility
Either raising or lowering the price will result in smaller profits
Criticism of the Model – explains why price is pretty inflexible not what prices are set, When the macroeconomy is unstable, prices are instable. Price reductions lead to a price war
Cartels and other collusion – it would be profitable to collude and fix prices and create barriers to entry. Price and Output – each firm’s demand curve is indeterminate unless we know how the other firms will react. We will assume that they will match the price leaders price, so each demand curve is straight – therefore the same graph represents all three firms
If company A chooses where MC = MR = P (like a monopoly) the other firms will keep the same price and A’s demand curve will shift to the Left as customers shift loyalty
Each firm finds it profitable to charge where MC = MR, so they should collude to charge that price
Overt Collusions – the OPEC Cartel – cartel – a group of producers that typically creates a formal written agreement specifying how much each member will produce and forgo
Output must be controlled and divided up to maintain the agreed on price
OPEC controls 60% of oil traded internationally so they are able to drive prices up/lower them
Covert Collusion – also Tacit understandings – informal agreements about collusion
Obstacles to Collusion – Demand and Cost differences – difficult to agree on a price, Number of firms – The larger the number of firms, the harder it is to have a Cartel
Cheating – There is still a tendency to offer a lower price to steal competition
Recession – Slumping markets increase ATC
Potential Entry – Higher prices attract more firms
Legal Obstacles: Antitrust Law : prohibit cartels and price fixing
Price Leadership Model – Dominant firm initiates price changes and everyone else follows the leader
Leadership Tactics –
Infrequent price changes – Price is changed only when demand and cost has been changed significantly,
Communications – communicates the need to raise/lower prices so other firms can react,
Limit pricing – Set prices below profit-maximizing level in order to discourage other companies from entering the industry,
Breakdowns in Price Leadership: Price Wars – Price leadership usually ends when one company undercuts the other companies and a price war results
Oligopoly and Advertising – each firms share of the total market is best determined by product development and advertising
Product development and advertising are less easily duplicated then price cuts and therefore can produce longer lasting gains
Oligopolists generally have capital to put into product development
Advertising is prevalent in monopolistic and Oligopolistic competition
Positive effects of advertisements – Spreding info about products helps people make rational discussions and break up monopolies, enhances competition – greater economic efficiency
Negative effects of advertising – some ads convey little about product attributes, two costly advertising campaigns can be canceling
Oligopoly and efficiency
Productive and Allocative efficiency – P – minimum ATC
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