@article{elston1963WeightFree,
	title = {A {Weight}-{Free} {Index} for the {Purpose} of {Ranking} or {Selection} with {Respect} to {Several} {Traits} at a {Time}},
	volume = {19},
	issn = {0006-341X},
	url = {https://www.jstor.org/stable/2527573},
	doi = {10.2307/2527573},
	abstract = {The problem is considered of how to rank individuals with respect to measures on several traits jointly when nothing is to be assumed about what economic weights are appropriate. A selection or ranking index is developed on intuitive grounds and then shown to be in a certain sense weight-free. The use of this index is illustrated for two traits measured on chickens. The case where there are errors of measurements is also discussed; in this case a modification of Smith's [1936] selection index may be appropriate.},
	number = {1},
	urldate = {2018-10-05},
	journal = {Biometrics},
	author = {Elston, R. C.},
	year = {1963},
	pages = {85--97}
}

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