Chp 13 - monopolistic competition Flashcards
what is a monopolistic competition?
a market structure in which:
1. a large number of firms compete
2. each firm produces a differentiated product
3. firms compete on product quality, price and marketing
4. firms are free to enter and exit the industry
what’s the 3 implications for each individual firm in the industry in a monopolistic competition
- small market share - each firm supplies a small part of the total industry –> thus each firm has only limited power to influence the price of tis product as firm’s price can deviate from the average price of other firms by a relatively small amount
- ignore other firm - a firm must be sensitive to the average market price of the product, but the firm does not pay attention to any one individual competitor –> all firms are relatively small so no one firm can dictate market conditions and the actions of no one firm directly affect the actions of the other firms
- collusion impossible - firms would like to be able to conspire to fix a higher price (collusion) but bc the number of firms is large, coordination is difficult and collusion is not possible
define product differentiation
a firm makes a product that is slightly different from the product of competing firms and is a close substitute for the products of the other firms
product differentiation allows firms to compete with other firms in which 3 areas? and how?
- quality - physical attributes that make it different from the products of other firms (design, reliability, services provided to buyer, buyer’s ease of access to the product)
- price - firms can set its price and output - tradeoff between price and product’s quality
- marketing - firm must market its product - advertising + packaging
does a firm in monopolistic competition make economic profit in the long-run? why?
they cannot make an economic profit in the long-run bc in the long-run firms neither enter nor leave the industry (as monopolistic competition have no barriers to prevent new firms from entering the industry in the long-run)
how of economists measure whether a market is sufficiently competitive to be classified as monopolistic competition
measure of concentration
what are the 2 main measures of concentration
- the 4-firm concentration ratio
- the Herfindahl-Hirschman Index
define the 4-firm concentration ratio? what does a low or high concentration ratio mean?
the percentage of the total revenue accounting for by the 4 largest firms in an industry - main measure used to assess market structure
a low concentration ration indicates a higher degree of competition and vice versa
what does a concentration ratio of 60% or more in the 4-firm concentration ration mean?
60% - a market that is highly concentrated and dominated by a few firms
less than 60% - an indication of a competitive market
define the herfindahl hirschman index (HHI)
the square of the percentage market share of each firm summed over the largest 50 firms in a market
in perfect competition, herfindahl-hirschman is ___
small
what’s the HHI value of a monopoly
10,000 (100^2 * 1)
when is a market regarded as being competitive in HHI values?
1,500-2,500
what’s the market for an HHI that exceeds 2,500
being concentrated and uncompetitive
describe an oligopoly in term is HHI and concentration ratio
a market with a high concentration ration and high HHI
what are the limitations of a concentration measure? explain
- geographical scope of the market - concentration measures take a national view of the market - many goods are sold in a national market but some are sold in a regional or global market
- barriers to entry and firm turnover - some market are highly concentration (entry = easy and large firm turnover rate) and a market with a few firms might be competitive because of potential entry
- market and industry correspondence - markets do not always correspond closely to industries bc 1. markets are often narrower than industries 2. most firms make several products