Watanabe, Noriyasu2023-05-232023-05-2319942020-02-21https://repository.upenn.edu/handle/20.500.14332/43977All findings, interpretations, and conclusions of this paper represent the views of the author(s) and not those of the Wharton School or the Pension Research Council. © 1996 Pension Research Council of the Wharton School of the University of Pennsylvania. All rights reserved.EconomicsWorking Paper