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Bulletin of Economic Research > 66 > S1 > S74 - S91
Telecommunications Policy > 2011 > 35 > 6 > 532-542
Information Economics and Policy > 2004 > 16 > 1 > 31-55
Bulletin of Economic Research > 66 > S1 > S74 - S91
Telecommunications Policy > 2011 > 35 > 6 > 532-542
Information Economics and Policy > 2004 > 16 > 1 > 31-55