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A Constrained Linear Estimator for Multiple Regression

Published online by Cambridge University Press:  01 January 2025

Clintin P. Davis-Stober*
Affiliation:
University of Missouri
Jason Dana
Affiliation:
University of Pennsylvania
David V. Budescu
Affiliation:
Fordham University
*
Requests for reprints should be sent to Clintin P. Davis-Stober, University of Missouri at Columbia, 210 McAlester Hall., Columbia, MO, 65211, USA. E-mail: stoberc@missouri.edu

Abstract

“Improper linear models” (see Dawes, Am. Psychol. 34:571–582, 1979), such as equal weighting, have garnered interest as alternatives to standard regression models. We analyze the general circumstances under which these models perform well by recasting a class of “improper” linear models as “proper” statistical models with a single predictor. We derive the upper bound on the mean squared error of this estimator and demonstrate that it has less variance than ordinary least squares estimates. We examine common choices of the weighting vector used in the literature, e.g., single variable heuristics and equal weighting, and illustrate their performance in various test cases.

Information

Type
Original Paper
Copyright
Copyright © 2010 The Psychometric Society

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