Document Type : Research Paper
Authors
.
., .., & ., .. (2002). . Economics Research, 2(4), 201-222.
., .., & ., .. ".", Economics Research, 2, 4, 2002, 201-222.
. .., . .. (2002). '.', Economics Research, 2(4), pp. 201-222.
. . & . ., ".," Economics Research, 2 4 (2002): 201-222,
. .., . .. . Economics Research. 2002;2(4):201-222 (In Persian).
