The implementation of policies promoting the adoption of an Open Science culture must be accompanied by indicators that allow monitoring the penetration of such policies and their potential effects on research publishing and sharing practices. This study presents indicators of Open Access (OA) penetration at the institutional level for universities worldwide. By combining data from Web of Science, Unpaywall and the Leiden Ranking disambiguation of institutions, we track OA coverage of universities' output for 963 institutions. This paper presents the methodological challenges, conceptual discrepancies and limitations and discusses further steps needed to move forward the discussion on fostering Open Access and Open Science practices and policies.

中文翻译：

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全球大学对开放获取的采用

促进采用开放科学文化的政策的实施必须伴随着指标，以允许监测此类政策的渗透及其对研究出版和共享实践的潜在影响。本研究展示了全球大学在机构层面的开放获取 (OA) 渗透率指标。通过结合来自 Web of Science、Unpaywall 和 Leiden Ranking 机构的消歧数据，我们跟踪了 963 家机构的大学产出的 OA 覆盖率。本文提出了方法论挑战、概念差异和局限性，并讨论了推进关于促进开放获取和开放科学实践和政策的讨论所需的进一步步骤。