A unified theory of risk

Philosophical Quarterly (forthcoming)
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Abstract

A novel theory of comparative risk is developed and defended. Extant theories are criticized for failing the tests of extensional and formal adequacy. A unified diagnosis is proposed: extant theories consider risk to be a univariable function, but risk is a multivariate function. According to the theory proposed, which we call the unified theory of risk, the riskiness of a proposition is a function of both the proportion and the modal closeness of the possible worlds at which the proposition holds. It is argued the theory passes the tests of extensional and formal adequacy.

Author Profiles

Jaakko Hirvelä
University of Helsinki (PhD)
Niall J. Paterson
University of Bristol

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