Document Type : Research Paper
Author
.
., .. (2004). . Economics Research, 4(12), 93-116.
., .. ".", Economics Research, 4, 12, 2004, 93-116.
. .. (2004). '.', Economics Research, 4(12), pp. 93-116.
. ., ".," Economics Research, 4 12 (2004): 93-116,
. .. . Economics Research. 2004;4(12):93-116 (In Persian).
