Individual State Legislator Shor-McCarty Ideology Data, January 2025 Update

The Shor-McCarty individual state legislator ideology data is being released as an update to the data underlying Shor and McCarty 2011 and updated in Shor and McCarty 2022 (please cite these if you use our data). The new data features 28,987 unique state legislators (compared with 27,629 in the previous release). The ideology measures (called “Shor-McCarty NPAT Scores” or “Shor-McCarty Common Space Scores”) are based on individual-level ideal point estimates described fully in these articles. The data stretch from 1993 to 2022, newly incorporating the 2020 and 2021 state legislative elections, and filling in a portion of data missing in previous releases.