In this paper, we consider a finite-horizon model with the time-additive utility and the time varying discount rate. With the assumption of the concavity of absolute risk tolerance, the concavity of the consumption function has been proved. This result significantly broadens the conclusion of...

We re-examine the link between absolute prudence and self-protection activities. We show that the level of effort chosen by an agent with decreasing absolute prudence is larger than the optimal effort chosen by a risk-neutral agent if the degree of absolute prudence is less than a threshold that...

Kimball (1990a,b) established that income risk increases the marginal propensity to consume if and only if absolute prudence decreases. We characterize decreasing and increasing multivariate prudence and show that a multidimensional risk increases the marginal propensity to consume if and only...

We show that a steeply increasing workload before a deadline is compatible with time-consistent preferences. The key departure from the literature is that we consider a stochastic environment where success of effort is not guaranteed.

This letter develops a set of simple conditions under which an individual is willing to save an extra amount of money due to the presence of ambiguity concerning his second period wealth. This extra precautionary saving motive is naturally associated with the notion of ambiguity prudence.

With interest rates near the zero lower bound, I propose a simple framework to indicate the monetary policy stance as a “shadow short rate”. I apply a one-factor model to Japan, provide associated economic intuition, and discuss multiple-factor extensions.

Estimates of agents’ risk aversion differ between market studies and experimental studies. We demonstrate that these estimates can be reconciled through consistent treatment of agents’ propensity for narrow framing.

A large class of stochastic OLG economies with nonclassical production is shown to possess a unique Markov Equilibrium (ME) which is also the unique sequential equilibrium. Additional properties such as monotonicity, continuity, and smoothness of the ME are also discussed.