 Two Paradigms and Nobel Prizes in Economics: a Contradiction or Coexistence?Haim Levy, Enrico G. De Giorgi and Thorsten Hens European Financial Management, 2012, vol. 18, issue 2, 163-182 Abstract: Abstract  Markowitz and Sharpe won the Nobel Prize in Economics for the development of Mean†Variance (M†V) analysis and the Capital Asset Pricing Model (CAPM). Kahneman won the Nobel Prize in Economics for the development of Prospect Theory. In deriving the CAPM, Sharpe, Lintner and Mossin assume expected utility (EU) maximisation in the face of risk aversion. Kahneman and Tversky suggest Prospect Theory (PT) as an alternative paradigm to EU theory. They show that investors distort probabilities, make decisions based on change of wealth, exhibit loss aversion and maximise the expectation of an S†shaped value function, which contains a risk†seeking segment. Can these two apparently contradictory paradigms coexist? We show in this paper that although CPT (and PT) is in conflict to EUT, and violates some of the CAPM's underlying assumptions, the Security Market Line Theorem (SMLT) of the CAPM is intact in the CPT framework. Therefore, the CAPM is intact also in CPT framework. Date: 2012 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:bla:eufman:v:18:y:2012:i:2:p:163-182 Ordering information: This journal article can be ordered from Access Statistics for this article European Financial Management is currently edited by John Doukas More articles in European Financial Management from European Financial Management Association Contact information at EDIRC. |
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