(78) Causa C-62/86, AKZO contro Commissione, [1991] Racc. I-3359, paragrafo 60; causa T-228/97, Irish Sugar contro Commissione, [1999] Racc. II-2969, paragrafo 70, causa Hoffmann-LaRoche contro Commissione, op.cit., paragrafo 41, causa T-139/98, AAMS e altri contro Commissione [2001] ECR II-0000, paragrafo 51.
(78) Case C-62/86, AKZO v Commission, [1991] ECR I-3359, paragraph 60; Case T-228/97, Irish Sugar v Commission, [1999] ECR II-2969, paragraph 70, Case Hoffmann-La Roche v Commission, op. cit, paragraph 41, Case T-139/98, AAMS and Others v Commission [2001 ECR II-0000, paragraph 51. However, large market shares can become accurate measurements only on the assumption that competitors are unable to expand their output by sufficient volume to meet the shifting demand resulting from a rival's price increase.