This readme file was generated on [2025-07-15] by Yitong Ye

# GENERAL INFORMATION

*Title of Dataset: Climate Policy Ambition Index (CPAI)

##Author Information:
Name: Yitong Ye
ORCID: https://orcid.org/0009-0004-2420-9383
Institution: Department of Social and Policy Sciences, University of Bath, Bath, UK; School of Political and Social Sciences, University of Glasgow, Glasgow, UK.
Email: yy2609@bath.ac.uk; yeyitong66@gmail.com (alt)

*Date of data collection: January - August 2022
*Geographic location of data collection: 35 countries

#SHARING/ACCESS INFORMATION

*Licenses/restrictions: Internal sharing only. This dataset is provided exclusively for research and review purposes. 

*Recommended citation for this dataset: Ye, Y., 2025. Dataset for "Assessing climate ambition through policy outputs: a comparative measure of 35 major emitters". Bath: University of Bath Research Data Archive. https://doi.org/10.15125/BATH-01592. 

#DATA & FILE OVERVIEW

##File list:

*CPAI.xlsx— Contains CPAI scores across 35 countries from 1990-2020, by indicator and aggregated index.
*Policy documents.xlsx — Contains policy documents used to develop the CPAI.
*Relationship between files: Policy documents (File 2) serves as the primary sources used to derive the indicator scores contained in the index (File 1).

#METHODOLOGICAL INFORMATION

*For detailed information on data collection and methodology, please refer to the related article: Ye, Y. Assessing climate ambition through policy outputs: a comparative measure of 35 major emitters. npj Clim. Action 4, 75 (2025). https://doi.org/10.1038/s44168-025-00278-7

#DATA SPECIFIC INFORMATION FOR CPAI.xlsx

*Number of variables: 12 indicators + Final score
*Number of cases: 35 countries × 31 years (1990-2020)
*Missing data codes: “..” (treated as 0 when aggregating the final score).
*Units: 0–1 cumulative scale (equal weights per indicator).