Authors
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., . & ., .. (2006). . Economics Research, 6(21), 57–79.
., .., & ., .. ".", Economics Research, 6, 21, 2006, 57–79.
., .., & ., .. (2006). '.', Economics Research, 6(21), pp. 57–79.
., . & ., .., ".." Economics Research, 6 21 (2006): 57–79,
. .., . .. . Economics Research. 2006;6(21):57–79 (In Persian).
