Attributed to Libby Rittenberg and Timothy Tregarthen Saylor.orgThe assumptions of the model of perfect competition, taken together, imply that individual buyers and sellers in a perfect
Trang 1Attributed to Libby Rittenberg and Timothy Tregarthen Saylor.org
The assumptions of the model of perfect competition, taken together,
imply that individual buyers and sellers in a perfectly competitive market
accept the market price as given No one buyer or seller has any influence
over that price Individuals or firms who must take the market price as
given are called price takers A consumer or firm that takes the market
price as given has no ability to influence that price A price-taking firm or
consumer is like an individual who is buying or selling stocks He or she
looks up the market price and buys or sells at that price The price is
determined by demand and supply in the market—not by individual
buyers or sellers In a perfectly competitive market, each firm and each
consumer is a price taker A price-taking consumer assumes that he or she
can purchase any quantity at the market price—without affecting that
price Similarly, a price-taking firm assumes it can sell whatever quantity it
wishes at the market price without affecting the price
You are a price taker when you go into a store You observe the prices
listed and make a choice to buy or not Your choice will not affect that
price Should you sell a textbook back to your campus bookstore at the end
of a course, you are a price-taking seller You are confronted by a market
price and you decide whether to sell or not Your decision will not affect
that price
To see how the assumptions of the model of perfect competition imply
price-taking behavior, let us examine each of them in turn
Identical Goods
In a perfectly competitive market for a good or service, one unit of the
good or service cannot be differentiated from any other on any basis A