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Correction: Decisions with Uncertain Consequences—A Total Ordering on Loss-Distributions

  • Stefan Rass,
  • Sandra König,
  • Stefan Schauer

In the ‘Generalizing ≤st: The ≼-Ordering’ subsection of ‘The Decision Framework’, there is an error in Lemma 2, Theorem 1 and Theorem 2, and additional hypotheses are included.

For Lemma 2, the correct hypothesis is: For any two probability distributions F1, F2 and associated random variables R1F1, R2F2, according to Definition 1. Let F1, F2 be jointly supported on a compact set Ω=[0,a] and let the respective density functions f1, f2 satisfy f1(a)≠f2(a). Then, there exists a number so that either [∀kK: mR1(k) ≤ mR2(k)] or [∀kK: mR1(k) ≥ mR2(k)].

For Theorem 1, the correct hypothesis is: Let be according to definition 1. Assume every element X to be represented by hyperreal number , where is any free ultrafilter. Let X, Y be arbitrary, and satisfying the hypothesis of Lemma 2 with . Then, X ≼ Y if x ≤ y in , irrespectively of .

For Theorem 2, the correct hypothesis is: Let X, Y have the distributions F1, F2 satisfying the hypothesis of Lemma 2. If X ≼ Y, then there exists a threshold so that for every , we have .

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Reference

  1. 1. Rass S, König S, Schauer S. Decisions with Uncertain Consequences-A Total Ordering on Loss-Distributions. PLoS One. 2016;11(12):e0168583. pmid:28030572