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Acknowledgments US Department of Transportation - BTS

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consistency between the different modes regarding the types <strong>of</strong> expenditures included, these additional data from theHighway Statistics report have not been used.Data AdjustmentsRevisions and corrections to previously published data have been made in most cases. The base year for chaineddollar estimates for current data sets is 1996, while the earlier version was presented in chained 1992 dollars.Moreover, the following adjustments have been incorporated.Revenues<strong>Transportation</strong>-related revenues <strong>of</strong> the Aquatic Resources Fund have been added to water transportation revenues.In this case, only the excise tax charged on motor boat fuels for the Boat Safety Program is assumed to betransportation-related.The preceding data series did not account for revenues <strong>of</strong> Pollution Fund, Off-Shore Oil Pollution Fund, and DeepWater Port Liability Fund prior to FY 1990. The current data sets includes revenues for these funds prior to FY 1990.ExpendituresNot all expenditures for the U.S. Coast Guard (<strong>US</strong>CG), as reported by the Office <strong>of</strong> Management and Budget, areconsidered transportation-related. A new approach has been used to arrive at more accurate <strong>US</strong>CG transportationrelatedexpenditures. Similar to the previous approach, the current approach includes all expenditures forEnvironmental Compliance and Restoration, Alteration <strong>of</strong> Bridges, and Oil Spill Recovery. Part <strong>of</strong> the expenditures forOperations, Acquisition, Construction and Improvement, Research & Development, and Test and Evaluation areconsidered as transportation. Within these program areas, only Aids to Navigation, Marine Safety, and MarineEnvironmental Protection activities are included in the earlier data sets. In the current version, more activities likeSearch and Rescue and Ice Operations have been included. In addition, Boat Safety Program expenditures havealso been included.Trust fund share <strong>of</strong> pipeline safety was added to the Research and Special Programs Administration expendituressince FY 1994. This item was not covered in the previously published data.Federal GrantsFederal grants to state and local governments for the Boat Safety Program have been included. These were notincluded in the previously reported data.Data for federal transit grants are obtained from the Office <strong>of</strong> Management and Budget public budget database. In theprevious data series, they were estimated by deducting direct federal transit expenditures grants from the total federaltransit expenditures.REFERENCESCorrado, C., C. Gilbert, et al. (1997). "Industrial production and capacity utilization: historical revision and recentdevelopments." Federal Reserve Bulletin 83(2): 67.Korn, E.L. and B.I. Graubard.1991."A Note on the Large Sample Properties <strong>of</strong> Linearization, Jackknife and BalancedRepeated Replication Methods for Stratified Samples." The Annals <strong>of</strong> Statistics 19 (4):2275-2279.Krewski, D. and J.N. K. Rao.1981."Inference from Stratified Samples: Properties <strong>of</strong> Linearization, Jackknife andBalanced Repeated Replication Methods." The Annals <strong>of</strong> Statistics 9(5):1010-1019.Kunze, K. and M. Jablonski (1998). Productivity in service-producing industries. Brookings Workshop on NewService-Sector Data, Washington, DC.

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