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Postal monopoly : An assessment of the Private Express Statutes
Haldi, John, (1974)
Post Office Department
(1968)
The economics of the postal service
Baratz, By Morton S., (1962)
Nobelpreis für Wirtschaftswissenschaften 2001 an George Akerlof, Michael Spence und Joseph Stiglitz
Schulz, Norbert, (2002)
Globalization and growth : implications for a post-crisis world
Spence, Michael, (2010)
Urbanization and growth
Spence, Michael, (2009)