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<P>Many significant developments in theories of additive values or utilities have come forth in the past few years. This note summarizes these developments for research workers interested in the subjective evaluation of multiple-factor alternatives. In particular, assumptions axioms that permit the use of an additive-value formula are presented. These may enable one to test the warrantability of an additive procedure in specific situations where the theory might be applied.</P>

Letter to the Editor—A Note on Recent Developments in Additive Utility Theories for Multiple-Factor Situations