Case T-827/14: Judgment of the General Court of 13 December 2018 — Deutsche Telekom v Commission (Competition — Abuse of a dominant position — Slovak market for broadband telecommunications services — Access by third-party undertakings to the ‘local loop’ of the incumbent operator on that market — Decision finding an infringement of Article 102 TFEU and of Article 54 of the EEA Agreement — Single and continuous infringement — Definition of ‘abuse’ — Refusal to grant access — Margin squeeze — Calculation of margin squeeze — Equally efficient competitor test — Rights of defence — Imputation to a parent company of an infringement committed by its subsidiary — Decisive influence of the parent company over the subsidiary’s commercial policy — Actual exercise of such influence — Burden of proof — Calculation of the amount of the fine — 2006 Guidelines on the method of setting fines — Separate fine imposed solely on the parent company for repeated infringement and application of a multiplier for the purpose of deterrence)