The Transparency Adherence Index measures the extent to which countries are adhering to current biennial reporting requirements under the United Nations Framework Convention on Climate Change (UNFCCC) according to a methodology detailed in Weikmans, R., & Gupta, A. (2021). Assessing state compliance with multilateral climate transparency requirements: ‘Transparency Adherence Indices’ and their research and policy implications. Climate Policy, 21(5), 635–651. https://doi.org/10.1080/14693062.2021.1895705