financial information frauds involving Enron, auditing firm Arthur Andersen, the telecommunications company WorldCom, Qwest and Sunbeam, among other well-known corporations. These problems highlighted the need to review the effectiveness of accounting standards, auditing regulations and corporate governance principles. In some cases, management manipulated the figures shown in financial reports to indicate a better economic performance. In others, tax and regulatory incentives encouraged over-leveraging of companies and decisions to bear extraordinary and unjustified risk. The Enron scandal deeply influenced the development of new regulations to improve the reliability of financial reporting, and increased public awareness about the importance of having accounting standards that show the financial reality of companies and the objectivity and independence of auditing firms. In addition to being the largest bankruptcy reorganization in American history, the Enron scandal undoubtedly is the biggest audit failure causing the dissolution of Arthur Andersen, which at the time was one of the five largest accounting firms in the world. After a series of revelations involving irregular accounting procedures conducted throughout the 1990s, Enron filed for Chapter 11 bankruptcy protection in December 2001. One consequence of these events was the passage of the Sarbanes–Oxley Act in the United States in 2002, as a result of the first admissions of fraudulent behavior made by Enron. The act significantly raises criminal penalties for securities fraud, for destroying, altering or fabricating records in federal investigations or any scheme or attempt to defraud shareholders. Fraud and error Accounting fraud is an intentional misstatement or omission in the accounting records by management or employees which involves the use of deception. It is a criminal act and a breach of civil tort. It may involve collusion with third parties. An accounting error is an unintentional misstatement or omission in the accounting records, for example misinterpretation of facts, mistakes in processing data, or oversights leading to incorrect estimates. Acts leading to accounting errors are not criminal but may breach civil law, for example, the tort of negligence. The primary responsibility for the prevention and detection of fraud and errors rests with the entity's management. See also Accounting information system Accounting records References External links Operations Research in Accounting on the Institute for Operations Research and the Management Sciences website fi:Laskentatoimi