 There have been a number of descriptive attempts to explain global sensitivity, by those who are either uninterested in normative questions or assume that EU is the correct normative theory. The most well-known of these are prospect theory (Kahneman &amp; Tversky 1979; Tversky &amp; Kahneman 1992) and generalized utility theory (Machina 1982, 1983, 1987); others are mentioned in the discussion below. See Starmer (2000) for an overview.