Individual State Legislator Shor-McCarty Ideology Data, April 2023 Update

The Shor-McCarty individual state legislator ideology data is being released as an update to the data underlying Shor and McCarty 2011. The new data features 27,629 unique state legislators (compared with 24,716 in the previous release). The ideology measures are based on individual-level ideal point estimates described fully in that article. Measures are all in NPAT common ideological space to facilitate explicit comparisons across time and between and within states. The new data spans 1993 through 2020.