Document Type : Research Paper
Author
.
.,. . (2003). .. Economics Research, 3(9), 161-190.
.,. . ".", Economics Research, 3, 9, 2003, 161-190.
. .. (2003). '.', Economics Research, 3(9), pp. 161-190.
. ., ".," Economics Research, 3 9 (2003): 161-190,
. .. .. Economics Research. 2003;3(9):161-190 (In Persian).
