RT Journal Article SR Electronic T1 The United States market wealth portfolio* JF The Journal of Portfolio Management FD Institutional Investor Journals SP 82 OP 92 DO 10.3905/jpm.1979.408720 VO 6 IS 1 A1 Roger G. Ibbotson A1 Carol L. Fall YR 1979 UL https://pm-research.com/content/6/1/82.abstract AB