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The NOMINATE Model The Influence of Psychometrics on Ideal Point Estimation in Political Science.

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Presentation on theme: "The NOMINATE Model The Influence of Psychometrics on Ideal Point Estimation in Political Science."— Presentation transcript:

1 The NOMINATE Model The Influence of Psychometrics on Ideal Point Estimation in Political Science

2 Born: 27 April 1944 Died: 22 April 2002

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4 Roger Shepard Born: 30 January 1929

5 Joseph B. Kruskal, Jr. Born: 29 January 1928 Died: 19 September 2010

6 Herbert F. Weisberg Born 1941

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9 Driving Distances Between 11 Cities
ATLANTA BOISE BOSTON CHICAGO CINCINNATI DALLAS DENVER LOS ANGELES MIAMI WASHINGTON CASBS

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11 Table 2.4 Driving Distances as an Unfolding Problem
Houston NYC Orlando Portland St Louis San Diego Atlanta Boise Boston Chicago Cincinnati Dallas Denver Los Angeles Miami Washington San Francisco

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13 90th Senate ( ) Table 2.4: Roll Call Voting as an Unfolding Problem Roll Call ETC. Johnson (D-US) N Y Sparkman (D-AL) N Y N N Y N Y Y N N Y N N N Y Y Hill (D-AL) N Y N N Y N Y Y Y Y Y Y Y Y N N Y Y Gruening (D-AK) N Y N Y N Y N N N N Y Y N Y Y Bartlett (D-AK) N Y N N Y Y Y N N N Y N Y Y Y Y Y N Y Hayden (D-AZ) N N Y Y N Y Y Y N N Y N Y Y Y N N Y Y Fannin (R-AZ) N Y N Y Y N Y Y N Y Y N Y Y Y Y N N N N Fulbright (D-AR) N Y N Y N Y N N Y McClellan (D-AR) N Y N N Y N Y Y Y N Y Y Y Y Y N N Y Kuchel (R-CA) Y N Y Y Y N Y N N N N N Y N Y N Y N Murphy (R-CA) N Y N Y Y N Y Y N N Y Y Y N Y Y N N N N

14 The NOMINATE (Nominal Three-Step Estimation)Voting Model
Each Legislator is represented by a Point Each Roll Call Vote is represented by two points, one corresponding to the Yea Outcome, and one corresponding to the Nay Outcome Legislators vote Probabilistically for the closest Outcome

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