"Risk Aversion over Incomes and Risk Aversion over Commodities" Juan E. Martinez-Legaz and John K.-H Quah Nuffield College, University of Oxford Abstract: This note determines the precise connection between an agent's attitude towards income risks and his attitude over risks in the underlying consumption space. Our results follow a general mathematical theory connecting the curvature properties of an objective function with the ray-curvature properties of its dual. Keywords: risk aversion, concavity, duality