Recession and a changing mail market have altered mail streams — especially first-class mail, over which the United States Postal Service has a monopoly. Despite cost-cutting, the USPS will face hard choices if it is to stay financially viable in the long run.
Dieke, Alex K., Antonia Niederpruem, and James I. Campbell. "Study on Universal Postal Service and the Postal Monopoly, Appendix E: Universal Service and Postal Monopoly in Other Countries." George Mason University School of Public Policy, November 2008.
U.S. Postal Service: Network Rightsizing Needed to Help Keep USPS Financially Viable. U.S. Government Accountability Office, May 2009.