Climate Policy Ambition: Exploring A Policy Density Perspective

Open Access Journal | ISSN: 2183-2463

Article | Open Access

Climate Policy Ambition: Exploring A Policy Density Perspective


  • Simon Schaub Institute of Political Science, Heidelberg University, Germany
  • Jale Tosun Institute of Political Science, Heidelberg University, Germany / Heidelberg Center for the Environment, Heidelberg University, Germany
  • Andrew Jordan Tyndall Centre for Climate Change Research, University of East Anglia, UK
  • Joan Enguer Institute of Political Science, Heidelberg University, Germany


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Abstract:  National policy ambition plays a central role in climate change governance under the Paris Agreement and is now a focus of rapidly emerging literature. In this contribution, we argue that policy ambition can be captured by the level of national policy activity, which in accordance with the existing literature should be referred to as “policy density.” In this study, we measure climate policy density by drawing on three publicly available databases. All three measurements show an upward trend in the adoption of climate policy. However, our empirical comparison also reveals differences between the measurements with regard to the degree of policy expansion and sectoral coverage, which are due to differences in the type of policies in the databases. For the first time, we compare the patterns of policy density within each database (2000–2019) and reveal that while they are different, they are nonetheless potentially complementary. Since the choice of the database and the resulting measurement of policy density ultimately depend on the questions posed by researchers, we conclude by discussing whether some questions are better answered by some measurements than others.

Keywords:  climate policy; policy density; policy instruments; policy outputs

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DOI: https://doi.org/10.17645/pag.v10i3.5347


© Simon Schaub, Jale Tosun, Andrew Jordan, Joan Enguer. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 license (http://creativecommons.org/licenses/by/4.0), which permits any use, distribution, and reproduction of the work without further permission provided the original author(s) and source are credited.