A review of national climate policies via existing databases

Various databases have been developed to track national climate policy efforts. These datasets facilitate comparisons across countries regarding policy activity, instrument choice, and policy effectiveness. This article evaluates these datasets to see whether they converge in their observations about climate policy development. Our findings reveal that all datasets agree at the aggregate level in that they show that ever-more climate policies are being adopted. However, they diverge significantly when scrutinizing more nuanced elements like policy instrument types and their stringency. The main contributions of our review are to highlight what research endeavors are already possible with existing datasets and to identify the gaps that still remain. We also provide concrete suggestions on how to enhance the existing datasets, making them more useful for social science research on climate policy. The article provides the most comprehensive and up-to-date source for scholars and practitioners interested in the comparative analysis of governmental climate policy efforts.