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(zîr′ō-sŭm′, zē′rō-)
Of or relating to a situation in which a gain is offset by an equal loss: "Under the zero-sum budgeting system that governs federal spending, the money for spinal research is likely to be deducted from some other research account" (Daniel S. Greenburg).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


relating to a situation in which one person's loss is equal to the other person's gain
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


denoting an element of game theory in which the amount lost is always equal to the amount gained: a zero-sum economy.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Such benefits need not involve a cost to the other contracted parties, because negotiation is more than just constant-sum bargaining over price.
This is a simple function of the constant-sum constraint.
Although the basis correlations approach zero, the constant-sum condition (i.e., "matrix closure," although this term is no longer favored) results in highly significant correlations among variables in the compositional data [ILLUSTRATION FOR FIGURE 1 OMITTED].
For example Butler (1981) used a variety of transformations and found the transformations do not correct for the constant-sum constraint even though the intervariable or interobservation relationships may be altered.
However, the constant-sum constraint would lead us to conclude that potentially meaningful patterns exist within the data if the underlying random nature of the raw data is unknown (i.e., nontrivial axes exist).
Although it is easy for researchers to rationalize such standardizations (e.g., only the patterns of relative abundance rather than total abundance are expressed in the compositional PCA), it is often unclear from subsequent analyses just how much of this result is meaningful pattern and how much of this is an artefact (i.e., due to the constant-sum constraint; see Fig.
However, from the simulation, we recognize that these patterns are due only to the constant-sum constraint of the compositional data and not to any meaningful relationships among the variables.
The first measure was a constant-sum scale that asked respondents to allocate a total of 100 points between the four uses.
The results of the constant-sum scale suggest a similar priority ranking for the four uses of Texas river water.

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