Document Type : Research Paper
Author
.
., .. (2002). . Economics Research, 2(6), 171-184.
., .. ".", Economics Research, 2, 6, 2002, 171-184.
. .. (2002). '.', Economics Research, 2(6), pp. 171-184.
. ., ".," Economics Research, 2 6 (2002): 171-184,
. .. . Economics Research. 2002;2(6):171-184 (In Persian).
