TY - JOUR TI - doi:10.1016/j.eneco.2004.12.002 | Elsevier Enhanced Reader PY - None LK - https://reader.elsevier.com/reader/sd/pii/S0140988304001008?token=CF276FF60981C38273CCDF64C33C5001C1A31C69B1E2915C7BDDA8FF0C3A229EC1ACA3275A30470783B877A01666CB4D&originRegion=us-east-1&originCreation=20220405212328 ER -