RT Journal Article T1 Why do companies employ prohibited unethical artificial intelligence practices? A1 Méndez Suárez, Mariano A1 Obesso Arias, María de las Mercedes de A1 Carrero Márquez, Oliver A1 Marín Palacios, Cristina AB In this article, we investigate the previously unstudied reasons why companies use prohibited artificial intelligence (AI) applications and are punished with large fines under the European General Data Protection Regulation (GDPR). Investigating and understanding why companies engage in such severe AI ethical malpractices is essential to correct them as they seriously jeopardize the future development of AI. Based on a sample of 34 companies, out of which 23 were sanctioned under GDPR due to severe violations of AI ethical principles and using fuzzy-set qualitative comparative analysis, this study demonstrates that to be an AI ethical company and comply with the GDPR regulation, it is necessary to have an AI ethical statement, have a very strong concern for information cybersecurity, and have to be based in a country considered ethical or monitor with care the behavior of the firm in countries with lower ethical standards. As a theoretical contribution, although some authors argue that AI ethical principles are useless, the present research introduces a new theoretical perspective by demonstrating cause–effect relationships between business configurations and AI ethical failures. In addition, the results have an important managerial relevance because they show that lack of an AI ethical statement is the most relevant condition that led to ethical misbehaviors. PB IEEE SN 0018-9391 YR 2023 FD 2023-03-28 LK https://hdl.handle.net/20.500.14352/125475 UL https://hdl.handle.net/20.500.14352/125475 LA eng NO Méndez-Suárez, M., de Obesso Arias, M. D. L. M., Márquez, O. C., & Palacios, C. M. (2023). Why do companies employ prohibited unethical artificial intelligence practices?. IEEE Transactions on Engineering Management, 71, 12218-12227. DS Docta Complutense RD 18 dic 2025