Aggregate State Legislator Shor-McCarty Ideology Data, April 2023 update

This version of the Shor-McCarty state legislative aggregate ideology data is being released as an update to the data underlying Shor and McCarty 2011. These are based on individual-level ideal point estimates described fully in that article. Estimates are all in Shor-McCarty NPAT common ideological space to facilitate explicit comparisons across time and between states. The data spans 1993 through 2020, with 2,519 chamber-years of data (compared with 2,268 in the previous release).