Quadratic Normal Program
(Under Construction -- I will finish this page before the end of June 2003)

Quadratic Normal (QN) is a scaling procedure that performs parametric unfolding of binary choice data. Given a matrix of binary choices by individuals (for example, Yes or No) over a series of Parliamentary votes, QN produces a configuration of legislators and Cutting Planes for each roll call using a probabilistic model of choice based upon the Quadratic Utility Function and Normally Distributed Random Error. It is discussed in detail in:

The geometry of the roll call voting problem is discussed in detail in the first two chapters of a book I am writing:

Examples

107th Senate (Detailed Discussion of Input and Output Files)
95th House
Brazilian Legislature 1995-98
California Assembly 1997-98

  1. Example One: The 107th Senate.

  2. Example Two: The 95th House.

  3. Example Three: The Brazilian Legislature 1995-98

  4. Example Four: California Assembly 1997-98