Titlebook: Big Data in Information Society and Digital Economy; Aleksei V. Bogoviz Book 2023 The Editor(s) (if applicable) and The Author(s), under e

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Perturbation Theory and Normal Forms,t, the paper proposes a set of the author’s recommendations for improving merchandising and trading practices in the activities of retailers in the digital economy. The contribution of the paper to the literature consists in the disclosure of features and prospects for improving the efficiency of re