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Table 7. iTIST Values for Selected Nontransportation Related Inputs (nTRI) Used in Air Transportation

Notes: 

Values are examples and not actual values from the TSAs

j = jth industry; i = ith commodity; k = kth mode

iTIST = amount of nontransportation related commodity i needed to generate in-house transportation services

Gjk = general ratio for industry j and mode k

Ijk = in-house transportation value for industry i and mode k

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics