Seminar paper from the year 2022 in the subject Economics - Industrial Economics, grade: 1,3, University of Applied Sciences Münster (Wirtschaft), language: English, abstract: The well-being of entrepreneurial ecosystems across the world varies significantly. Some countries offer a favourable landscape for entrepreneurs, and some are not capable of following the fast-paced economic standards. Several dimensions can be used to gain insights into how these ecosystems perform. Diversity, opportunities and choices, resilience and the quality of ecosystems are dimensions that represent the performance of ecosystems. Although several studies have been examining entrepreneurial ecosystems, it is crucial to develop a harmonised dataset containing all necessary measures as a unified base. Thus, increased attention must be given to comparing different ecosystems based on the same data. Therefore, this study aims to develop a harmonised dataset to develop further an index that reflects the performance of entrepreneurial ecosystems. Based on this index, ecosystems on the European level as well as the United Kingdom will be compared. Through quantitative literature review and data collection, a high-quality index has been developed. This research provides new insights into the well-being of ecosystems and how they differ from each other. The findings reveal a high correlation between diversity and quality of ecosystems and significant differences between countries. Further, the index functions as a tool to show how well each ecosystem performs on each dimension.