A General Accounting Office (GAO) publication, this 40-page document identifies and assesses the studies of ten key reports from nine different organizations regarding the economic impact of the terrorist attacks on the World Trade Center buildings in New York City (NYC). The organizations included in this review are the NYC Office of the Comptroller, NY Governor and State Division of the Budget, NYC Partnership and Chamber of Commerce, Fiscal Policy Institute, NY State Senate Finance Committee, Milken Institute, NY State Assembly Ways and Means Committee, NYC Independent Budget Office, and the Federal Reserve Bank of NY. This document objectively explores the studies and estimations of each organization's report, and determines if they meet standard economic criteria for analyzing economic impacts. Overall, the review finds that the study by the NYC Partnership provided "the most comprehensive estimates."