The estimates for 97 industries at the input-output two-digit level, including a discussion of the matrix algebra underlying the derivation of the tables and the alternative estimates of the make and use tables on an approximate 1987 Standard Industrial Classification basis, are available from BEA's Web site at <www.bea.doc.gov>; under "National," click on "Industry and wealth data," and look under "Input-Output data."

These estimates are also available for $20 on diskette—product number NDN–0247. To order, call the BEA Order Desk at 1–800–704–0415 (outside the United States, call 202–606–9666).