1. Aslan, A.B. and Efendioğlu, İ.H. (2019, March, 18-20). An Overview of Students Coming to Gaziantep University through International Agreements: Cross-National Cooperation in Education [Oral presentation]. International Türkiye Vision Congress, Adana, Türkiye.
2. Efendioğlu, İ. H. (2019, September, 04-06). The Effect of Conspicuous Consumption on Social Media on Purchase Intention [Oral presentation]. II.Business & Organization Research Conference. Izmir, Türkiye
3. Efendioglu, I. H., Mutlu, A. T., & Durmaz, Y. (2019, September, 05-07). The Effect of Brand on Mobile Phone Purchase Decisions: A Study of Generation Y Consumers [Oral presentation]. III. International Symposium on Economics, Finance and Econometrics, İskenderun, Türkiye.
4. Efendioglu, I.H. & Durmaz, Y.(2019, October, 04-08). The Impact of Perceptions of Social Media Advertisements on Advertising Value and Brand Awareness: Research on Generation Y Instagram Users [Oral presentation]. 11. Internatıonal Statıstics Congress, Bodrum, Turkiye.
5. Efendioğlu, İ.H. (2022, April, 23-24). Should One Invest in the Metaverse? The Effect of Perceived Risk on Purchase Intention from the Perspective of the Information Adoption Model [Oral presentation]. 9th International Management and Social Research Conference, İstanbul, Türkiye.
6. Efendioğlu, İ.H. (2022, May, 06-08). Why Do Consumers Prefer Websites Using Debt Card or Credit Card Storage Application in Online Shopping? The Effect of Values on Selection Behavior With the Theory of Consumption Value Perspective [Oral presentation]. Istanbul Gedik University International Modern Scientific Research Congress - III, Istanbul, Turkiye.
7. Efendioğlu, İ.H. (2022, May, 09-11). The Effect of Perceived Value and eWOM on Smartwatch Purchase Intention [Oral presentation]. Istanbul Yeni Yüzyıl University 8th Science Days Congress, İstanbul, Türkiye.
8. Efendioğlu, İ.H.(2022, May, 12-13). The Effects of Consumer Innovativeness, Price, and Environmental Concern on Electric Vehicle Purchase Intention in Türkiye in the Green Economy [Oral presentation]. GELISIM – UWE 6th International Conference on Economics and Finance, İstanbul, Turkiye.
9. Efendioğlu, İ.H. (2022, May, 13-16). The Rise of the NFT Market: The Effect of Social Media Interaction and the Need For Uniqueness on NFT Purchase Intention [Oral presentation]. III. International Academic Studies Congress, Osmaniye, Turkiye.
10. Efendioğlu, İ.H. (2022, May, 23-25). Examining the Factors Affecting Intention to Invest in Cryptocurrencies [Oral presentation].26th Marketing Congress. Kırşehir, Türkiye.
11. Efendioğlu, İ.H. (2022, July, 01-03). Web 3.0 Marketing [Oral presentation]. 8th International Communication in the New World Congress, Adıyaman, Turkiye.
12. Efendioglu, I.H. (2022, July, 04-05). What is the Difference Between AR, VR, MR, and XR? Augmented Reality Marketing and Applications [Oral presentation]. Çanakkale Onsekiz Mart University International Social Sciences Conference II, Çanakkale, Turkiye.
13. Efendioğlu, İ.H. (2022, October, 20-23). Artificial Intelligence Marketing [Oral presentation]. INCSOS VIII International Congress of Social Sciences, Tekirdağ, Turkiye.
14. Efendioglu, I.H. (2023, July, 28-30). The Change of Digital Marketing with Artificial Intelligence [Oral presentation]. 7th International Conference on Applied Research in Management, Economics and Accounting, Dublin, Ireland.
15. Efendioğlu, I.H. (2023, September, 07-09). The Power of Artificial Intelligence in Personalized Marketing [Oral presentation]. 22nd International Business Congress, İstanbul, Turkiye.
16. Ozkan, B., Efendioglu, I.H., Baran, T., & Koc, F. (2023, September, 27-29). The Effects of Perceived Price, Quality, and Consumer Trust on Purchase Intention of Halal Products [Oral presentation]. 14th Global Islamic Marketing Conference, Tbilisi, Georgia.
17. Efendioğlu, İ.H. (2023, October, 6-8). A Bibliometric Review of Publications on Collective Bargaining from a Marketing Perspective [Oral presentation]. Anatolia International Social Sciences Scientific Research Congress, Ankara, Türkiye.
18. Efendioglu, İ.H. (2023, November, 9-11). Systematic Literature Review on Online Second-Hand Luxury Shopping: A Sustainable and Accessible Trend [Oral presentation]. EMIDWORLD 1st International Congress on Economics Public Finance Business & Social Sciences. Kütahya, Turkiye.
19. Efendioglu, İ.H. (2023, November, 13-15). Digital Consumer Behavior: A Systematic Literature Review [Oral presentation]. VII. Congress of International Applied Social Sciences - C-iasoS 2023, Valletta, Malta
20. Efendioglu, İ.H. (2024, May, 09-11). Data Privacy in Marketing: A Bibliometric Analysis. [Oral presentation]. 23th International Business Congress, Kocaeli, Turkiye
21. Efendioğlu, İ. H. (2024, September 20–22). Conversational marketing with AI-powered chatbots: A bibliometric analysis. In Proceedings of the 4th International Congress on Digital Business, Management and Economics (ICDBME-2024). Tarsus, Turkiye
22. Efendioglu, İ.H. (2024, October, 02-05). Artificial Intelligence and Consumer Behavior: The Future of Marketing. [Oral presentation]. VIII. International Applied Social Sciences Congress - C-iasoS 2024, Peja, Kosovo
23. Efendioglu, İ.H. (2024, October, 15-17). Artificial Neural Networks in Marketing: A Comprehensive Review of Consumer Behavior Applications. [Oral presentation]. 12th International Data Science and Statistics Congress IDSSC 2024 , Ankara, Türkiye
24. Efendioglu, İ.H. (2024, October, 24-25). Metaverse Marketing and Consumer Dynamics: A New Era of Virtual Interaction. [Oral presentation]. VI. International Congress of Social Sciences, Sarajevo, Bosnia Herzegovin
25. Efendioglu, İ.H. (2024, November, 7-9). AI-Powered Content Creation in Marketing. [Oral presentation]. 2nd International Congress on Economics Public Finance Business & Social Sciences (EMIDWORLD 2024), İstanbul, Türkiye
26. Efendioğlu, İ. H. (2024, December 14–15). Marketing 5.0. 3rd International Congress of New Searches in Multidisciplinary Studies. İstanbul, Turkiye.
27. Bülbül, N., Çayırağası, F., & Efendioğlu, İ. H. (2024, December 26–30). The Effect of Attitudes toward Social Media Marketing Activities and Online Decision-Making Styles on Purchase Intention. 12th International Conference on Social Sciences. İzmir, Türkiye
28. Efendioğlu, İ. H. (2024, December 26–30). Metaverse Marketing. 12th International Congress of Social Sciences. İzmir, Türkiye
29. Efendioğlu, İ. H., and Aydemir, G. (2025, 14–16 May). Artificial intelligence success in content marketing: A systematic literature review and bibliometric analysis. VI. International Applied Statistics Congress (UYIK 2025), Ankara, Türkiye.
30. Haci İbrahim, M. H., Çayırağası, F., and Efendioğlu, İ. H. (2025, 14–16 May). The impact of brand trust erosion on boycott behavior: A contemporary assessment. VI. International Applied Statistics Congress (UYIK 2025), Ankara, Türkiye.
31. Efendioğlu, I. H., and Özergin, Ö. (2025, May,26). Ethical issues and consumer privacy in artificial intelligence-enabled marketing: A systematic literature review. In International Congress of Social Sciences Research: Proceedings book (p. 95). Medipol University Press. İstanbul, Turkiye
32. Efendioğlu, I. H. (2025, May, 26). The data revolution in digital marketing: Ethical personalization with zero- and first-party data. In International Congress of Social Sciences Research Proceedings book (p. 29). Medipol University Press. İstanbul, Turkiye
33. Efendioğlu, İ. H., and Tercan, Y. (2025, 13–15 June). Ethical Consumer Behavior and Sustainable Branding. EGE 13th International Conference on Social Sciences, İzmir, Türkiye.
34. Efendioğlu, İ. H. (2025, 13–15 June). The Effects of JOMO on Consumer Behavior. EGE 13th International Conference on Social Sciences, İzmir, Türkiye.
35. Villi, B., Köylüoğlu, A. S., Efendioğlu, İ. H., and Koç, F. (2025, 12–14 September). Academics’ AI Literacy: Dynamics of Use and Experience. 2nd International Balıkesir Applied Sciences Congress, Balıkesir, Türkiye.
36. Efendioğlu, İ. H. (2025, 28–30 September). Artificial Intelligence and Consumer Trust. 17th International Istanbul Scientific Research Congress, İstanbul, Türkiye.
37. Efendioğlu, İ. H. (2025, November, 5-6). Short-Form Video Algorithms, the Attention Economy, and Marketing Outcomes: A PRISMA-Based Systematic Review. In Proceedings of the 2nd International Media and Cultural Studies Conference (INMECS’25) Hasan Kalyoncu University, Gaziantep, Türkiye.
38. Efendioğlu, İ. H. (2025, November, 5-7). The Dark Side of Digitalization in AI-Powered Marketing: A Systematic Review of the Erosion of Consumer Trust. 9th TESAM International Social Sciences Congress: The Beginning of an Age of Crises: Economic, Political, and Social Dimensions. (pp. 111-113). https://doi.org/10.17574/tesam.9786256148666. İstanbul, Türkiye
39. Efendioğlu, İ. H. (2025, November, 18-20). AI-Enabled Algorithmic Persuasion and Consumer Autonomy: A Bibliometric and Systematic Review of Psychological Implications in Digital Marketing. 15th International Communication in the New World Congress. (pp. 752–771). Ankara Yıldırım Beyazıt University.Ankara/Türkiye