State Democracy Index

The State Democracy Index 2.0 is a quantitative measure of democratic performance across all 50 states within the U.S, from 2000 to 2023.

Download the data
Download the paper

SDI 2.0 Codebook

democracy_mcmc: Electoral Democracy Score (main measure used in paper)

democracy_mcmc_sd: Standard deviation of Bayesian posterior for Electoral Democracy Score

democracy_mcmc_se: Standard error of Bayesian posterior for Electoral Democracy Score

democracy_additive: Alternative Electoral Democracy Score (additive index)

Additional Resources

Democracy Indicator Data for SDI 2.0

State Democracy Index 1.0

The original state democracy index with data from 2000 to 2018 can be found here. The dataset is available for download here.