41Furthermore, it is settled case-law that the choice between the different methods of calculating the dumping margin, such as those set out in Article 2(11) of the basic regulation, together with the assessment of the normal value of a product or the determination of the existence of harm require an appraisal of complex economic situations and the judicial review of such an appraisal must therefore be limited to verifying whether relevant procedural rules have been complied with, whether the facts on which the contested choice is based have been accurately stated, and whether there has been a manifest error in the appraisal of those facts or a misuse of powers (see, to that effect, Case 240/84 NTN Toyo Bearing and Others v Council [1987] ECR 1809, paragraph 19; Case C-156/87 Gestetner Holdings v Council and Commission [1990] ECR I-781, paragraph 63; and Case C-150/94 United Kingdom v Council [1998] ECR I-7235, paragraph 54).
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