TY - JOUR T1 - Vas Ist Das? JF - The Journal of Portfolio Management SP - 18 LP - 28 DO - 10.3905/jpm.1983.18 VL - 9 IS - 2 AU - Richard Roll Y1 - 1983/01/31 UR - https://pm-research.com/content/9/2/18.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -