Samuelson vs Fama on the Efficient Market Hypothesis: The Point of View of Expertise

Samuelson vs Fama sur l’efficience informationnelle des marchés financiers: le point de vue de l’expertise

Thomas Delcey ()
Additional contact information
Thomas Delcey: CES - Centre d'économie de la Sorbonne - UP1 - Université Paris 1 Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique

Post-Print from HAL

Abstract: This paper investigates the polysemic character of the Efficient Market Hypothesis through a comparison of the contributions of the two authors who introduced this hypothesis in 1965, Eugene Fama and Paul Samuelson. While both had a normative approach, it is argued that the key point distinguishing the two contributions is the expertise developed by each author. Fama interpreted his model to make practical recommendations for investment strategy. Samuelson interpreted his model to discuss and promote a political expertise that would be useful for policymaking such as the Pareto optimality of speculative price or the social benefit of speculation. The second part investigates the context of paper writing. We suggest that two elements are central to explain Fama and Samuelson's stance: first, the contrasting viewpoints of their research institutions, respectively Chicago and MIT, and second, the position of each author in early financial economics. Finally, we show how their early contrasted stance is consistent with Fama and Samuelson's opposite reactions to the Efficient Market Hypothesis controversy in the 1980s. In conclusion, we suggest that this opposition between Fama and Samuelson is useful to discuss the early EMH controversy in the 1980s.

Keywords: efficient market hypothesis; polysemy; Samuelson (Paul A); Fama (Eugene F); efficience des marchés financiers; expertise; polysémie; Samuelson (Paul A.); Fama (Eugene F.) (search for similar items in EconPapers)
Date: 2019
New Economics Papers: this item is included in nep-his and nep-hpe
Note: View the original document on HAL open archive server: https://hal.science/hal-01618347v3
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

Published in Œconomia - History/Methodology/Philosophy, 2019, 9 (1), pp.37-58. ⟨10.4000/oeconomia.5300⟩

Downloads: (external link)
https://hal.science/hal-01618347v3/document (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-01618347

DOI: 10.4000/oeconomia.5300

Access Statistics for this paper

More papers in Post-Print from HAL
Bibliographic data for series maintained by CCSD ().