RT Journal Article SR Electronic T1 The after-tax duration of original issue discount bonds JF The Journal of Portfolio Management FD Institutional Investor Journals SP 70 OP 72 DO 10.3905/jpm.1985.408999 VO 11 IS 2 A1 Andrew J. Kalotay YR 1985 UL https://pm-research.com/content/11/2/70.abstract AB