How Organizational Improvisational, Transformational Leadership Styles Impact Innovation Performance of Start-Up Companies in VUCA Environments Topics: Big Data and Analytics; Business Process Management; Communication, Collaboration and Information Sharing; Enterprise Information Systems; KM Strategies and Implementations ; Learning Organization & Organizational Learning; Management and Organisational Issues in Information Systems In Proceedings of the 16th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management - Volume 3: , 295-304, 2024 , Porto, Portugal