TY  - JOUR
TI  - A Test of the Efficiency of a Given Portfolio
AU  - Michael R. Gibbons
AU  - Stephen A. Ross
AU  - Jay A. Shanken
JO  - Econometrica
PY  - 1989
VL  - 57
IS  - 5
DO  - 10.2307/1913625
UR  - https://doi.org/10.2307/1913625
ER  -