until marginal cost equals average variable cost.

until total revenue equals total cost.

until marginal cost begins to rise.

as long as marginal revenue is greater than or equal to marginal cost.

utilizing unfair methods to set dynamic pricing

utilizing unfair methods to eliminate the integration of new services

utilizing unfair methods to eliminate competition

utilizing unfair methods to force competitors to lower their prices

Monopolistic competition and oligopoly

Pure competition and pure monopoly

Pure monopoly and oligopoly

Pure competition and monopolistic competition

the quantity of the product demanded is very large

firms to not make a profit in the long-run

firms produce a homogeneous product

the market demand curve cannot be increased

mutual interdependence 

price limitations when advertising product differentiation is effective

independence among large firms in the industry

low barriers to entry for firms with homogeneous products

product differentiation

perfect substitutes

government deregulation

barriers to entry

set prices based on market demand

influence output

avoid mutual interdependence

they only exist in monopolies

they are barriers to entry

they all must be present for price discrimination to exist

they help explain why a monopolist's MR = MC

ATR

ATC

product price

only to purely competitive firms

only to monopolies

only when the firm is a "price taker"

to firms in all types of industries