US Department of Justice
Us Department of Justice: Antitrust Enforcement and the Consumer [Pdf]
This article outlines how the Antitrust Division of the Department Of Justice works for and protects the typical American consumer.
Wikimedia
Wikipedia: Cartel
This on-line encyclopedia provides the legal definition and examples of a cartel.
Other
Antitrust Report: Department of Justice Amnesty Program Takes Another Turn
This article looks at whether, once a company or individual has been offered amnesty in cases such as price fixing or collusion, can the Justice Department reverse their offer of amnesty? (4/1/2005)
Independence Hall Association
U.s. History: The New Tycoons: J. Pierpont Morgan
J. Pierpont Morgan was not business tycoon who made his money from manufacturing. Read about how he accumulated wealth, how he helped the government through some economic panics, and why the government took him to court.
Wikimedia
Wikipedia: Collusion
Provides a definition and many examples of collusion, along with obstacles facing a successful collusive agreement.