There is a surprising disconnect between formal rational choice theory and philosophical work on reasons. The one is silent on the role of reasons in rational choices, the other rarely engages with the formal models of decision problems used by social scientists. To bridge this gap, we propose a...

This article analyzes the impact of risk on decisions made by the poor within the context of the Individual Development Account (IDA) program. IDA is a matched savings program designed to help low-income households invest in appreciating assets. For these households, the risk involved with...

This paper extends Savage's subjective approach to probability and utility from decision problems under exogenous uncertainty to choice in strategic environments. Interactive uncertainty is modeled both explicitly - using hierarchies of preference relations, the analogue of beliefs hierarchies -...

Using as a starting point a popular version of the utility function, we obtain a value for the risk aversion parameter as implied by the market equilibrium portfolio, that is, the mean-variance efficient portfolio with the maximum Sharpe ratio. Moreover, we obtain a value for the utility of the...