These have to be padi regardless of level of output.
What are fixed costs?
Firms will shut down in the short run when these are greater than price.
What are variable costs?
Monopolistically competitive firms have this because of differentiation and low barriers to entry.
What is market power?
Debeers diamond company owning all of the diamond mines is an example of this barrier to entry.
What is control of scarce resources?
The amount of producers in a monopoly.
What is a a single seller?
P=MC. Perfectly Competitive firms are always this.
What is allocative efficiency?
This is the defining characterisitc of this market structure.
What is mutual interdependence?
This is the ability of businesses to enter and exit the market due to profitability.
What is free entry and exit?
Railroads, camera phones, and the internet would be examples of this.
What is a technological monopoly?
Tradmarks, copyrights, patents, etc.
What are legal restrictions?
This is a long-surviving cartel in the petroleum industry and the approximate percentage of the market it controls.
What is OPEC, and 70%?
The way to tell if a market is an oligopoly.