RT Journal Article SR Electronic T1 Does Time Diversification Increase Risk or Reduce it? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 1 OP 1 DO 10.3905/jpm.11.4.1 VO 11 IS 4 A2 Peter L. Bernstein YR 1985 UL https://pm-research.com/content/11/4/1.abstract AB