This note reconsiders the classical problem of precautionary saving in the presence of an interest-rate risk, and provides a new interpretation of the threshold of 2 for the relative prudence index, which characterizes the necessary and sufficient condition for precautionary saving

This paper studies attention allocation behavior of rationally inattentive consumers who have CRRA preferences, face uninsured capital income risk, and suffer from an information-processing capacity constraint. For given attention devoted to capital income risk, we solve for the optimal...

I study the consumption-saving problem with non-separable utility under ambiguity. Using smooth ambiguity aversion, I show that the introduction of ambiguity and greater ambiguity aversion raise optimal saving. When relative prudence in ambiguity preferences is bounded by 2, also greater...