Emerging Sources Citation Index (ESCI), launched late in 2015, is a Web of Science Core Collection Index that focuses on high-quality, peer-reviewed publications of regional importance and in emerging scientific fields. Journals in ESCI have passed an initial editorial evaluation and can continue to be considered for inclusion in Web of Science Core Indexes (such as Arts & Humanities Citation Index, Science Citation Index, and Social Science Citation Index) which have more rigorous evaluation processes and selection criteria.