{"id":"ideology-scores","title":"Ideology scores (DW-NOMINATE)","group":"congress","group_label":"Congress","description":"Each member's two-dimensional DW-NOMINATE and Nokken-Poole scores in each Congress, 1st through 119th.","grain":"one member, Congress and chamber","page":"https://insidegov.fyi/congress/ideology","sources":["Lewis, Poole, Rosenthal, Boche, Rudkin and Sonnet (2026), Voteview: Congressional Roll-Call Votes Database, https://voteview.com/"],"license":null,"url":"https://insidegov.fyi/api/v1/datasets/ideology-scores","units":"Scores run about -1 to +1; dimension 1 is the liberal-conservative axis.","methodology":"https://github.com/corbett-hobbs/insidegov/blob/main/docs/DATA_CONVENTIONS.md","row_count":50932,"fields":[{"name":"bioguide_id","type":"string","note":null},{"name":"congress_number","type":"number","note":null},{"name":"chamber","type":"string","note":null},{"name":"nominate_dim1","type":"number","note":"Career-fixed position, liberal (-) to conservative (+)."},{"name":"nominate_dim2","type":"number","note":null},{"name":"nokken_poole_dim1","type":"number","note":"Position estimated from that Congress alone."},{"name":"nokken_poole_dim2","type":"number","note":null},{"name":"n_votes","type":"number","note":"Roll-call votes the member cast that Congress."},{"name":"party_code","type":"number","note":"Voteview's own party code."}],"sample":[{"bioguide_id":"A000001","congress_number":82,"chamber":"house","nominate_dim1":0.23,"nominate_dim2":0.085,"nokken_poole_dim1":0.229,"nokken_poole_dim2":0.081,"n_votes":110,"party_code":200},{"bioguide_id":"A000002","congress_number":80,"chamber":"house","nominate_dim1":0.09,"nominate_dim2":0.972,"nokken_poole_dim1":-0.105,"nokken_poole_dim2":0.669,"n_votes":41,"party_code":100},{"bioguide_id":"A000002","congress_number":81,"chamber":"house","nominate_dim1":0.09,"nominate_dim2":0.972,"nokken_poole_dim1":-0.084,"nokken_poole_dim2":0.881,"n_votes":199,"party_code":100}],"rows_url":"https://insidegov.fyi/api/v1/datasets/ideology-scores/rows","attribution":{"name":"InsideGov","url":"https://insidegov.fyi/","text":"Data from InsideGov (https://insidegov.fyi). Please credit InsideGov when you use it.","terms":"https://insidegov.fyi/api"}}