Predatory pricing, also known as undercutting, is a pricing strategy in which a product or service is set at a very low price with the intention to achieve new customers (Loss leader), or driving competitors out of the market or to create barriers to entry for potential new competitors. Predatory pricing, also known as undercutting, is a pricing strategy in which a product or service is set at a very low price with the intention to achieve new customers (Loss leader), or driving competitors out of the market or to create barriers to entry for potential new competitors. Theoretically, if competitors or potential competitors cannot sustain equal or lower prices without losing money, they go out of business or choose not to enter the business. The so-called predatory merchant then theoretically has fewer competitors or even is a de facto monopoly. Predatory pricing is considered anti-competitive in many jurisdictions and is illegal under some competition laws. However, it can be difficult to prove that prices dropped because of deliberate predatory pricing, rather than legitimate price competition. In any case, competitors may be driven out of the market before the case is ever heard. In the short term, predatory pricing through sharp discounting reduces profit margins, as would a price war, and will cause profits to fall. These two steps are also called predation stage (offering goods/services below its costs in order to price its competitors out of the market); the second step is called recoupment stage ( this stage only arises in cases where the dominant firm succeeds in squeezing competitors out of the market - within this stage the dominant firm charges monopoly prices in the effort to cover their losses). There are various tests to assess whether the pricing is predatory: Areeda-Turner suggests it is below Short Run Marginal Costs, the AKZO case suggests it is costing below Average Variable Costs, and the case of United Brands suggests it is simply when the difference in cost between the cost of manufacturing and the price charged to consumers is excessive. Yet businesses may engage in predatory pricing as a longer term strategy. Competitors who are not as financially stable or strong may suffer even greater loss of revenue or reduced profits. After the weaker competitors are driven out, the surviving business can raise prices above competitive levels (to supra competitive pricing). The predator hopes to generate revenues and profits in the future that will more than offset the losses it incurred during the predatory pricing period. This is known as recoupment, but two recent decisions by the courts, Tetra Pak II and Wanadoo stated that this is not necessary for a finding of predatory pricing. This is a short-term strategy—the predator undergoes short-term pain for long-term gain. Therefore, for the predator to succeed, it must have sufficient strength (financial reserves, guaranteed backing or other sources of offsetting revenue) to endure the initial lean period. There must be substantial barriers to entry that prevent the re-appearance of competitors when the predator raises prices.