摘要：The article offers information on the class action litigation which is related to the adjudication of highly concerned class actions. It states that the decisions related to the class actions lie in the statements discussed in the Erie Doctrine. It also informs that the particular issues and situations in a case defines the use of federal law and state law in the U.S.
关键词：Civil procedure; Legislation; Class actions (Civil procedure); Federal government; Enabling legislation Federal Rules of Civil Procedure
