RT Journal Article SR Electronic T1 Default, risk, and yield spreads JF The Journal of Portfolio Management FD Institutional Investor Journals SP 65 OP 66 DO 10.3905/jpm.1982.408882 VO 8 IS 4 A1 Thomas A. Lawler YR 1982 UL https://pm-research.com/content/8/4/65.abstract AB