Authors
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.,. , .,. and .,. . (2006). .. Economics Research, 6(21), 121-150.
.,. , , .,. , and .,. . ".", Economics Research, 6, 21, 2006, 121-150.
. ., . ., . .. (2006). '.', Economics Research, 6(21), pp. 121-150.
. ., . . and . ., ".," Economics Research, 6 21 (2006): 121-150,
. ., . ., . .. .. Economics Research. 2006;6(21):121-150 (In Persian).
