Document Type : Research Paper
Author
.
., .. (2004). . Economics Research, 4(13), 197-227.
., .. ".", Economics Research, 4, 13, 2004, 197-227.
. .. (2004). '.', Economics Research, 4(13), pp. 197-227.
. ., ".," Economics Research, 4 13 (2004): 197-227,
. .. . Economics Research. 2004;4(13):197-227 (In Persian).
