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After a literature review on retail, e-commerce, and competition strategy, the main criteria and sub-criteria of multicriteria retail e-commerce alternative selection are presented. Cost leadership, differentiation, and focusing strategies are evaluated as competitive strategies, based on the opinions of experts collected through a questionnaire. The results of the study show that the strategies are ranked as differentiation, focus, and cost leadership strategies, respectively.<\/jats:p>","DOI":"10.3233\/jifs-202010","type":"journal-article","created":{"date-parts":[[2021,7,27]],"date-time":"2021-07-27T13:13:06Z","timestamp":1627391586000},"page":"2617-2637","source":"Crossref","is-referenced-by-count":1,"title":["Competitive strategy selection in retail E-Commerce using IF AHP &amp; TOPSIS methodology"],"prefix":"10.1177","volume":"41","author":[{"given":"Mahmut Mahir","family":"Kurt","sequence":"first","affiliation":[{"name":"\u0130stanbul Ticaret \u00dcniversitesi, Institute of Science and Technology, Istanbul, Turkey"}]},{"given":"Osman","family":"Yaz\u0131c\u0131o\u011flu","sequence":"additional","affiliation":[{"name":"\u0130stanbul Ticaret \u00dcniversitesi, Faculty of Engineering, Industrial Engineering, Istanbul, 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