RT Journal Article SR Electronic T1 Effective and Empirical Durations of Mortgage Securities JF The Journal of Fixed Income FD Institutional Investor Journals SP 17 OP 33 DO 10.3905/jfi.1997.408190 VO 6 IS 4 A1 Lakhbir S Hayre A1 Hubert Chang YR 1997 UL https://pm-research.com/content/6/4/17.abstract AB