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Gasmi, Farid, Kennet, Mark D., Laffont, Jean-Jacques and Sharkey, William W. (2002) Cost Proxy Models and Telecommunications Policy: A New Empirical Approach to Regulation. The MIT Press Cambridge ISBN 9780262072373
Gasmi, Farid, Kennet, Mark D., Laffont, Jean-Jacques and Sharkey, William W. (2002) Cost Proxy Models and Telecommunications Policy: A New Empirical Approach to Regulation. The MIT Press Cambridge ISBN 9780262072373