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7Joseph Francois and Bernard Hoekman, Market Access in the Service Sectors, Manuscript, Tinbergen Institute, 1999.
8Tony Warren, The impact on output of impediments to trade and investment in telecommunications services, "Impediments to Trade in Services: Measurement and Policy Implications" , pp. 85-100, 2001.
9Alan Deardorff and Robert Stem, Measurement of Nontariff Barriers, Ann Arbor: University of Michigan Press, 1998.
