ERS 2007 Benchmark Input/Output Trade Margins
These categories contain agricultural or agriculturally derived products. (For example, "Buttons, pins, and all other miscellaneous" includes feathers). They are listed by stage of processing as reflected in the North American Industrial Classification System (NAICS).
By turning these base-year values into a percentage distribution, a modeler can allocate shipping, handling, and distribution charges to the appropriate sector (i.e., producer, transportation, or wholesale and retail trade) for estimating port-value multipliers. Output producer and port aggregate multipliers are also derived by this procedure. For more information, see the margins section of the Assumptions.