TY - JOUR T1 - Changes in Corporate Credit Quality 1970–1990 JF - The Journal of Fixed Income SP - 7 LP - 14 DO - 10.3905/jfi.1992.408031 VL - 1 IS - 4 AU - Douglas J. Lucas AU - John G. Lonski Y1 - 1992/03/31 UR - https://pm-research.com/content/1/4/7.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -