Document Type : Research Paper
Author
.
., .. (2002). . Economics Research, 2(6), 49-72.
., .. ".", Economics Research, 2, 6, 2002, 49-72.
. .. (2002). '.', Economics Research, 2(6), pp. 49-72.
. ., ".," Economics Research, 2 6 (2002): 49-72,
. .. . Economics Research. 2002;2(6):49-72 (In Persian).
