Finding Leverage Groups / David E. Coleman.

By:

Coleman, David E

Contributor(s):

National Bureau of Economic Research

Material type: Text

TextSeries: Working Paper Series (National Bureau of Economic Research) ; no. w0195.Publication details: Cambridge, Mass. National Bureau of Economic Research 1977.Description: 1 online resource: illustrations (black and white)Online resources:

Available additional physical forms:

Hardcopy version available to institutional subscribers

Abstract: A brief discussion of recent methods using the Hat Matrix for identifying leverage points, and clustering techniques for finding groups of data points is presented. The problem of identifying leverage groups is addressed, and a heuristic algorithm for identifying both leverage points and leverage groups is proposed. Semi-portable FORTRAN code implementing the algorithm, a sample terminal session, and a discussion of the terminal session are included.

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Item type	Home library	Collection	Call number	Status	Date due	Barcode	Item holds
Working Paper	Biblioteca Digital	Colección NBER	nber w0195 (Browse shelf(Opens below))	Not For Loan

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Previous	nber w0192 The Pacific Basin in World Trade: Part III, An Analysis of Changing Trade Patterns, 1955-1975 /	nber w0193 The Optimal Taxation of Foreign Source Investment Income /	nber w0194 Cost-Benefit Analysis Under Uncertainty /	nber w0195 Finding Leverage Groups /	nber w0196 An Adaptive Nonlinear Least Square Algorithm /	nber w0197 An Agricultural Time Series-Cross Section Data Set /	nber w0198 The Economics of Migration: An Empirical Analysis with Special Referenceto the Role of Job Mobility /	Next

August 1977.

A brief discussion of recent methods using the Hat Matrix for identifying leverage points, and clustering techniques for finding groups of data points is presented. The problem of identifying leverage groups is addressed, and a heuristic algorithm for identifying both leverage points and leverage groups is proposed. Semi-portable FORTRAN code implementing the algorithm, a sample terminal session, and a discussion of the terminal session are included.