RT Journal Article SR Electronic T1 Global Diversification in a Shrinking World JF The Journal of Portfolio Management FD Institutional Investor Journals SP 57 OP 67 DO 10.3905/jpm.1992.409427 VO 19 IS 1 A1 Lawrence S. Speidell A1 Ross Sappenfield YR 1992 UL https://pm-research.com/content/19/1/57.abstract AB