January2024CEPRPOLICYINSIGHTNo.125EconomicprinciplesfortheenforcementofabuseofdominanceprovisionsChiaraFumagalliandMassimoMotta1UniversitàBocconiandCEPR;ICREA-UniversitatPompeuFabraandBarcelonaSchoolofEconomics1INTRODUCTIONOn27March2023,theEuropeanCommission(EC)amendedtheGuidanceonenforcementpriorities,2whichwasissuedin2009,3andannounceditwouldwritenewguidelinesonexclusionaryabuses.ItalsopublishedaCompetitionPolicyBriefexplainingtheseinitiativesinlightoftheevolutionofthecaselawandtheEC’spractice(EuropeanCommission,2023).InthisPolicyInsight,weofferourviewonhowtouseeconomicstoimprovetheenforcementoftheabuseofdominanceprovisionsofArticle102TFEU.WeshalldosobycoveringthepointsamendedbytheECGuidancePaperanddiscussedintherelatedPolicyBrief.Inparticular,Section2willdiscussthedefinitionandtheobjectiveofexclusionaryabuse;Section3willfocusonhorizontalforeclosure,suggestinghowtotreatconductsuchaspredation,rebates,andexclusivedealing;andSection4willfocusonforeclosureinadjacentmarkets,discussinghowtotreat,forinstance,refusaltosupply,marginsqueeze,self-preferencing,andtying.Beforedealingmoreextensivelywitheachoftheseissues,however,wespelloutafewprinciplesthatinourviewshouldguideaneffects-basedapproachofexclusionaryabuse,andsummarisethemainargumentsweshallmakeinourpaper.1.1GeneralprinciplesWewelcometheEC’sintentiontoiss...
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