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| (95) | From an economic point of view, the most accurate method of the comparator-based methods is the one that combines the before-during-after approach and the cross-sectional approach. This method is the difference-in-differences approach (86). It focuses on the development of the relevant economic variable in the market affected by the passing-on during a certain period (difference over time in the passing-on market) and compares it to the development of the same variable during the same time period in an unaffected comparator market (for instance in another geographical market).

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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.