The document discusses the model of perfect competition. It begins by outlining the key assumptions of perfect competition including many small firms, homogeneous products, perfect information, and barriers to entry or exit. It then provides examples of markets that approximate perfect competition such as agricultural markets. The document explains how under perfect competition firms are price takers in both the short run and long run and how price and output are determined. It concludes by discussing how perfect competition leads to productive, allocative, and dynamic efficiency.
A presentation which shows basic differences between the Market Types and properties of the Market Structure.
The types are:
1. Monopoly
2. Oligopoly
3. Monopolistic
4. Perfect Competition
This slide provides a detailed explanation regarding the "Perfect Competition"
A presentation which shows basic differences between the Market Types and properties of the Market Structure.
The types are:
1. Monopoly
2. Oligopoly
3. Monopolistic
4. Perfect Competition
This slide provides a detailed explanation regarding the "Perfect Competition"
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Price determination under different market structure and characterstics of all these market stractures along with graphical presentation of Perfect competition, Monopoly, Monopolistic and Oligopoly market structue
perfect competition, monopoly, monopolistic and oligopolysandypkapoor
Price determination under different market structure and characterstics of all these market stractures along with graphical presentation of Perfect competition, Monopoly, Monopolistic and Oligopoly market structue
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2. Key issues
• The meaning of perfect competition
• Characteristics of perfect competition
• Price and output under competition
• Competition and economic efficiency
• Wider benefits of competition in markets
3. Assumptions Behind a Perfectly Competitive
Market
• Many 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 a price taker
• Identical output produced by each firm – homogeneous products that are
perfect substitutes for each other
• Consumers have complete information about prices
• Transactions are costless - Buyers and sellers incur no costs in making an
exchange
• All firms (industry participants and new entrants) have equal access to
resources (e.g. technology)
• No barriers to entry & exit of firms in long run – the market is open to
competition from new suppliers
• No externalities in production and consumption
4. Examples of Perfectly Competitive Markets?
• It is rare to find a pure example of perfect competition
• But there are some close approximations:
– Foreign exchange dealing
• Homogeneous product - US dollar or the Euro
• Many buyers & sellers
• Usually each trader is small relative to total market and has to take
price as given
• Sometimes, traders can move currency markets
– Agricultural markets
• Pig farming, cattle
• Farmers markets for apples, tomatoes
• Wholesale markets for fresh vegetables, fish, flowers
• Street food markets in developing countries
6. Price taking firms
• Competitive firms have little direct influence on the ruling
market price
• Examples of price-taking behaviour:
– Local farmers selling to large supermarkets
– RJB Mining selling coal to electricity generators
– A local steel firm selling as much as it can at the ruling
international price of steel
• When most firms in a market are price takers, there is only a
small percentage difference in the prices of selected products
within the market
• The law of one price may hold true – most of the existing
firms sell at the prevailing price
7. Short run price and output
MC
Price Price
MS MR=MC AC
Maximum
Profits
P1 AR=MR
P1
AC1
MD
Output Q1 Output
8. Showing short run profits
MC
Price Price
MS Profits = AC
(P1-AC1)
x Q1
P1 AR=MR
P1
AC1
MD
Output Q1 Output
9. A rise in market demand
New level of
supernormal MC
Price Price profits
MS AC
AR2=MR2
P2
P2
P1 AR=MR
P1
AC1
MD2
MD
Output Q1 Q2 Output
10. What is a Long Run Equilibrium?
• The usual interpretation of a long run equilibrium is as
follows:
• (1) The quantity of the product supplied in the market
equals the quantity demanded by all consumers
• (2) Each firm in the market maximizes its profit, given the
prevailing market price
• (3) Each firm in the market earns zero economic profit
(i.e. normal profit) so there is no incentive for other firms
to enter the market
You Tube video on perfect competition
12. Long run equilibrium price
MC
Price Price
MS AC
MS2
P1 AR=MR
P1
AR2=MR2
P2
MD
Output Q2 Output
13. The long run equilibrium
MC
Price Price In the long run
MS equilibrium, AC
normal profits are
made i.e. price =
average cost
MS2
AR2=MR2
P2
MD
Output Q2 Output
14. Competition and Economic Efficiency
• Economic efficiency has several meanings:
• Productive efficiency
– when output is produced at the lowest feasible
average cost (either in the short run or the long
run)
• Allocative efficiency
– achieved when the price of output reflects the
true marginal cost of production
– (i.e. price=marginal cost)
18. Competition and Economic Efficiency
• Technological efficiency
– where maximum output is produced from given
inputs
• Dynamic Efficiency
– Refers to the range of choice and quality of
service
– Also considers the pace of technological change
and innovation in a market
19. Allocative efficiency
• Allocative efficiency
– achieved when it is impossible to make someone
better off without making someone else worse off
• Also called Pareto Optimality
• No trades are left that would make one person
better off without hurting someone else
• Occurs when price = marginal costs of production
• This occurs in the long run under perfect competition
20. Importance of a Competitive Environment
• The standard view is that competition drives an
improvement in welfare and efficiency
• Competition forces under-performing firms out of
the market and shifts market share to more efficient
firms in the long run
• Competition encourages firms to innovate and adopt
best-practise techniques
21. How useful is model of perfect competition?
• Assumptions are not meant to reflect real world markets
where most assumptions are not satisfied
– Pure competition is largely devoid of what most people
would call real competitive behaviour by businesses!
– The model provides a theoretical benchmark against which
we compare and contrast imperfectly competitive markets
– Consider perfect competition as a point of reference
• Useful when considering
– The effects of monopoly or other forms of imperfect
competition
– The case for free international trade
22. Real world – imperfect competition!
• Some suppliers have a degree of control over market supply
• Some consumers have monopsony power against suppliers because
they purchase a significant percentage of total demand
• Most markets have heterogeneous products due to product
differentiation.
• Consumers nearly always have imperfect information and their
preferences and choices can be influenced by the effects of
persuasive marketing and advertising
• The real world is one in which negative and positive externalities
from both production and consumption are numerous
• Finally there may be imperfect competition in related markets such
as the market for essential raw materials, labour and capital goods.
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