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doi:10.1016/S0304-4068(97)00805-7 
Copyright © 1997 Published by Elsevier Science B.V.
Separable utility functions*1
Available online 9 June 1998.
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Abstract
We present a necessary and sufficient condition for the norm properness of separable utility functions. The condition is illustrated with a variety of examples. The condition and the examples indicate that norm uniformly proper separable utility functions are much “closer” to linear utility functions than previously suspected.
We also take this opportunity and present in a systematic and simplified manner the basic properties of separable utility functions that are scattered in a fragmented way throughout the literature.
Author Keywords: Separability; Properness; Supportability
JEL classification codes: D51; D60; D90
