RT Journal Article SR Electronic T1 International investing JF The Journal of Portfolio Management FD Institutional Investor Journals SP 23 OP 27 DO 10.3905/jpm.1981.408829 VO 8 IS 1 A1 Ambachtsheer, Keith P. YR 1981 UL http://jpm.pm-research.com/content/8/1/23.abstract AB