Document Type : Research Paper
Authors
.
., .., & ., .. (2004). . Economics Research, 4(15), 197-238.
., .., & ., .. ".", Economics Research, 4, 15, 2004, 197-238.
. .., . .. (2004). '.', Economics Research, 4(15), pp. 197-238.
. . & . ., ".," Economics Research, 4 15 (2004): 197-238,
. .., . .. . Economics Research. 2004;4(15):197-238 (In Persian).
