ECON 101 Study Guide - Midterm Guide: Regulatory Capture, Deadweight Loss, State Ownership

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25 Jun 2018
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Econ101 Chapter 13 Reading Notes
Monopolist: a firm that is the only producer of a good that has no close substitutes
Monopolist- the sole (or almost sole) producer of a good
An industry controlled by a monopolist is known as a monopoly
Monopolists behaved differently from producers in perfectly competitive industries: whereas perfect
competitors take the price at which they can sell their output as given, monopolists know that their actions
affect market prices and consider that effect when deciding what to produce
Perfect competition and monopoly are particular types of market structure
Some markets are monopolies in which there is no competition at all
Four principal models of market structure: monopoly, oligopoly, perfect competition, and monopolistic
competition; this system of market structures is based on the number of producers in the market and
whether the goods offered are identical or differentiated
Differentiated goods are goods that are different but somewhat substitutable ex. coke and pepsi
In monopoly, a single producer sells a single, undifferentiated product
In oligopoly, a few producers- more than 1 not a lot- sell products either identical or differentiated
In monopolistic competition, many producers each sell a differentiated product
In perfect competition, many producers sell an identical product
In the long run, how many firms are in the market depends on whether there are conditions that make it
difficult for new firms to enter; when these conditions are present- there tend to be monopolies and
oligopolies but when they aren’t, markets tend to perfectly or monopolistically competitive
Why some markets have differentiated products versus identical depends on the nature of the good and
consumers’ preferences
Supply& demand model is a model of perfect competition;
Perfect competition: only if there are many producers producing the same identical good
Monopoly is the most extreme departure from perfect competition
Monopolies are hard to find in US due to policies that prevent them but ex. pharmaceuticals
Market power: ability of a firm to raise prices; ex. monopolist raising prices above equilibrium price
Market power is ability of a firm to raise its prices above competitive level by reducing output
The reason a monopolist reduces output and raises price compared to the perfectly competitive industry
levels is to increase profit; under monopoly, the profits don’t go away in the long run
Monopolists aren’t the only types of firms that possess market power ex. oligopolists
For a profitable monopoly to exist, there must be barriers to entry
To earn economic profit, a monopolist must be protected by a barrier to entry- something that prevents other
firms from entering the industry: there are 5 types
A monopolist that controls a resource or input crucial to an industry can prevent other firms from entering
its market- control of a scare resource or input
Increasing returns to scale: ATC falls as output increases
In an industry w/ increasing returns to scale, larger companies are more profitable and drive out smaller
ones; for the same reason, established companies have a cost advantage over any entrant which can be a
potential barrier to entry; increasing returns to scale can both give rise to and sustain monopoly; a natural
monopoly exists when increasing returns to scale provide a large cost advantage to a single firm that
produces all of an industry’s output
The defining characteristic of a natural monopoly is that it possesses increasing returns to scale over the
range of output that is relevant to the industry
The natural monopolist has increasing returns to scale over the entire range of output for which any firm
would want to remain in the industry- the range of output at which the firm would break even
A firm that maintains a consistent technological advantage over potential competitors can establish itself
as a monopolist; but tech superiority isn’t a barrier to entry over the longer term
In certain high-tech industries, tech superiority isn’t a guarantee of success against competitors because of
network externalities: exist when the value of a good or service to an individual is greater when many
other people use the good or service as well
When a network externality exists, the firm with the largest network of customers using its product has an
advantage in attracting new customers, one that ma allow it to become a monopolist
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ECON 101 Full Course Notes
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Monopolist: a firm that is the only producer of a good that has no close substitutes. Monopolist- the sole (or almost sole) producer of a good. An industry controlled by a monopolist is known as a monopoly. Perfect competition and monopoly are particular types of market structure. Some markets are monopolies in which there is no competition at all. Four principal models of market structure: monopoly, oligopoly, perfect competition, and monopolistic competition; this system of market structures is based on the number of producers in the market and whether the goods offered are identical or differentiated. Differentiated goods are goods that are different but somewhat substitutable ex. coke and pepsi. In monopoly, a single producer sells a single, undifferentiated product. In oligopoly, a few producers- more than 1 not a lot- sell products either identical or differentiated. In monopolistic competition, many producers each sell a differentiated product. In perfect competition, many producers sell an identical product.

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