In these pages you will presidential power scores for 116 countries across 181 time periods.
The dataset on which the prespow1 and prespow2 scores are based can be accessed at the Harvard Dataverse Network here. With each measure, you will also find 95 per cent confidence intervals and standard errors for each country time period.
The scores are based on research by David Doyle and Robert Elgie. The paper in which the research is fully presented is forthcoming in the British Journal of Political Science and is available in advance here. The methodology can be found here.
When using the scores, please cite:
Doyle, David and Robert Elgie. 2015. Maximizing the reliability of cross-national measures of presidential power. British Journal of Political Science, DOI: 10.1017/S0007123414000465.
The original blog post setting out the aims of the new presidential power scores is available here.