25 Pages Posted: 9 Jul 2004
Date Written: June 2004
This paper analyzes investors' portfolio selection problems in a two-period dynamic model of Knightian uncertainty. We account for the existence of portfolio inertia in this two-period framework. Furthermore, by incorporating investors' updating behavior, we analyze how new observation in the first period will affect investors' behavior. By this analysis, we show that new observation in the first period will expand portfolio inertia in the second period compared with the case in which new observation has not been gained in the first period if the degree of Knightian uncertainty is sufficiently large.
Keywords: ε-Contaminations, Knightian Uncertainty
JEL Classification: D81, G11
Suggested Citation: Suggested Citation