RT Journal Article SR Electronic T1 Cross-Asset versus Time Diversification JF The Journal of Portfolio Management FD Institutional Investor Journals SP 24 OP 34 DO 10.3905/jpm.1996.409551 VO 22 IS 3 A1 Haim Levy A1 Yishay Spector YR 1996 UL https://pm-research.com/content/22/3/24.abstract AB