The predatory pricing argument is very simple. The predatory firm first lowers its price until it is below the average cost of its competitors. The competitors must then lower their prices below average cost, thereby losing money on each unit sold. If they fail to cut their prices, they will lose virtually all of their market share; if they do cut their prices, they will eventually go bankrupt. After the competition has been forced out of the market, the predatory firm raises its price, compensating itself for the money it lost while it was engaged in predatory pricing, and earns monopoly profits forever after.
The theory of predatory pricing has always seemed to have a grain of truth to it--at least to noneconomists--but research over the past 35 years has shown that predatory pricing as a strategy for monopolizing an industry is irrational, that there has never been a single clear-cut example of a monopoly created by so-called predatory pricing, and that claims of predatory pricing are typically made by competitors who are either unwilling or unable to cut their own prices. Thus, legal restrictions on price cutting, in the name of combatting "predation," are inevitably protectionist and anti-consumer ..
.. it seems plausible at first, the idea of predatory pricing lends itself to political demagoguery .. ideological anti-business pressure groups .. employ the predatory pricing tale in their efforts to discredit capitalism and promote greater governmental control of industry .. When prices go down, it can be relied on to issue a "study" claiming that the price reductions are part of a grand conspiracy to rid the market of all competitors. And when prices remain constant, price-fixing conspiracies are frequently alleged.
.. predatory pricing is a convenient weapon for businesses that do not want to match their competitors' price cutting. Filing an antitrust lawsuit is a common alternative to competing by cutting prices or improving product quality, or both.
Finally, some economists still embrace the theory of predatory pricing. But their support for the notion is based entirely on highly stylized "models," not on actual experience.