Abstract This special issue presents a small selection of contributions from Latmétricas 2021, among those submitted by authors. This Conference brought together more than 500 practitioners and researchers from every corner of Latin America and the Caribbean. There were sessions on new metrics, measuring open access effects on productivity and impact, the relationship between gender and scientific assessment, STI policies and assessment in regional governments, geohistoriometric indicators to evaluate the historical trajectories of scientific production, and assessment of infrastructure capacities. Peer Review https://publons.com/publon/10.1162/qss_e_00234