TY - JOUR T1 - Editor’s Letter JF - The Journal of Portfolio Management SP - 1 DO - 10.3905/JPM.2010.36.2.001 VL - 36 IS - 2 AU - Robert C Merton Y1 - 2010/01/31 UR - https://pm-research.com/content/36/2/1.abstract N2 - ER -