Document Type : Research Paper
Author
.
.,. . (2003). .. Economics Research, 3(10), 233-254.
.,. . ".", Economics Research, 3, 10, 2003, 233-254.
. .. (2003). '.', Economics Research, 3(10), pp. 233-254.
. ., ".," Economics Research, 3 10 (2003): 233-254,
. .. .. Economics Research. 2003;3(10):233-254 (In Persian).
