The Nobel Laureate's Monosyllabic Paper
In 1979 Samuelson mocked Kelly's supporters with a paper written almost entirely in one-syllable words. Seventy years on, its users are still here — and the fight forced fractional Kelly.
— Robert B.
In 1979, economics' 'pope' and Nobel laureate Paul Samuelson mocked Kelly's supporters with a paper written — save the signature — entirely in one-syllable English words, titled: Why we should not make mean log of wealth big though years to act are long. It was, he said, for the Kelly fans 'who can't follow hard math'.
What he attacked was the blind application of 'full Kelly + log utility'. Thorp fought back, and the field converged on a CRRA preference spectrum: fractional Kelly, choosing γ by risk aversion — exactly the tool professional investors use today.
"An academic opponent is often a collaborator in future correctness." It was Samuelson's attack that pushed the Kelly school toward fractional Kelly — which has saved countless investors over forty years.
Without that fight, Kelly might have stayed at 'full', and there would be more LTCM-style blowups. F-Star's fractional-Kelly default stands on the conclusion of this seventy-year argument.