RT Journal Article SR Electronic T1 The Development of Mean-Variance-Efficient Portfolios in Japan and the U.S. JF The Journal of Investing FD Institutional Investor Journals SP 48 OP 51 DO 10.3905/joi.1.2.48 VO 1 IS 2 A1 John B.. Guerard, Jr A1 Makoto Takano YR 1992 UL https://pm-research.com/content/1/2/48.abstract AB