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Deriving Ideal Points

Deriving Ideal Points. Optimal Classification Step1: find optimal cut points Nunn Helms Gore Kerry Dole B-2 N N N Y N Cambodia Y Y N N Y Tower N Y N N Y MLK N Y N N N | B-2. Classification Errors 1.

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Deriving Ideal Points

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  1. Deriving Ideal Points • Optimal Classification • Step1: find optimal cut points Nunn Helms Gore Kerry Dole B-2 N N N Y N Cambodia Y Y N N Y Tower N Y N N Y MLK N Y N N N | B-2 Classification Errors 1

  2. Deriving Ideal Points • Optimal Classification • Step2: move Senators to Reduce Error Nunn Helms Dole Gore Kerry B-2 N N N N Y Cambodia Y Y Y N N Tower N Y Y N N | | Cambodia B-2 Tower MLK Classification Errors 0 0 1

  3. Deriving Ideal Points • Optimal Classification • Repeat Step1: find optimal cut points. Helms Dole Nunn Gore Kerry B-2 N N N N Y Cambodia Y Y Y N N Tower Y Y N N N MLK Y N N N N | | Cambodia B-2 Tower MLK Classification Errors 0 1 0 1

  4. Deriving Ideal Points • Optimal Classification • Repeat Step1: find optimal cut points. Helms Dole Nunn Gore Kerry B-2 N N N N Y Cambodia Y Y Y N N Tower Y Y N N N MLK Y N N N N | | | Cambodia B-2 Tower MLK Classification Errors 0 0 0 1

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