FIRST SCREEN: IS AN ANTI-COMPETITIVE EFFECT POSSIBLE? The first question is whether it is possible that the engraving practice in question could have anti-competitive effects.144 The models described in section V.B contain a number of conditions necessary for the selection to have anti-competitive effects. However, a tie that meets these conditions does not necessarily have anti-competitive effects. Other conditions need to be checked – these additional tests are part of the second screen.145 2. RULE OF REASON 1N CONTEXT U.S. antitrust policy with respect to liaison had a long way between the hostile approach to the per se early rule and a modified per se rule that was willing to consider the possibility of tying efficiency gains (with four judges in favor of a rule of reason) under Jefferson Parish to a neutral position under the Microsoft III rule of reason. There are a number of possible explanations for the position of EC competition policy in relation to the spit and the divergence from the current US approach. 130. The monopoly-single profit theorem does not apply when the two goods are consumed in varying proportions. Trying to extract the rents obtained in the bound market by pricing the monopoly product is not a valid strategy in this case, since consumers would replace the monopolistic product. For example, a company could set up a walled garden or closed platform where a smart device is sold and apps, media, and other content can only be purchased through the smart device provider. .