Content-type: text/application/x-research-info-systems Provider: Palgrave Macmillan Content: application/x-research-info-systems TY - JOUR AU - Bilbao, A AU - Arenas, M AU - Jimenez, M AU - Perez Gladish, B AU - Rodriguez, M V TI - An extension of Sharpe's single-index model: portfolio selection with expert betas JA - J Oper Res Soc PY - 2005/12/14/online VL - 57 IS - 12 SP - 1442 EP - 1451 SN - 0160-5682 UR - http://dx.doi.org/10.1057/palgrave.jors.2602133 ER -