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counted as products <strong>of</strong> the manufacturing industry,<br />

rather than the transportation industry.<br />

There is another reason why calculating<br />

transportation-related final dem<strong>and</strong> as a component<br />

<strong>of</strong> GDP does not accurately reflect the<br />

industry’s contribution to the economy. This is<br />

because products <strong>of</strong> other industries delivered<br />

to final dem<strong>and</strong> for other social functions, such<br />

as housing, also contain values generated by the<br />

transportation industry. For example, when a<br />

consumer buys a new house, he or she pays not<br />

only for the l<strong>and</strong>, materials, <strong>and</strong> labor, but also<br />

for the transportation required to deliver goods<br />

<strong>and</strong> services used in the construction <strong>of</strong> the<br />

house.<br />

A proper measure <strong>of</strong> the contribution <strong>of</strong> the<br />

transportation industry to GDP is the valueadded<br />

generated by transportation in the production<br />

<strong>of</strong> its total output, that is, transportation<br />

services used by all industries in their production,<br />

plus transportation services delivered to<br />

final dem<strong>and</strong>.<br />

Measuring the contribution <strong>of</strong> the transportation<br />

industry to GDP based on value-added origination,<br />

however, leads to undercounting it, given<br />

Chapter 2 Transportation <strong>and</strong> the Economy � 41<br />

the current system <strong>of</strong> industrial classification<br />

used in the NIPA. Table 2-4 presents the valueadded<br />

contribution to GDP <strong>of</strong> several industries,<br />

including the for-hire component <strong>of</strong> the transportation<br />

industry. This component <strong>of</strong> the transportation<br />

industry includes only establishments<br />

that <strong>of</strong>fer transportation services to the public<br />

for a fee—the so-called for-hire transportation<br />

industries. The share <strong>of</strong> value-added in GDP<br />

originating from for-hire transportation decreased<br />

in current dollars from 3.8 percent in<br />

1980 to 3.3 percent in 1993 (the latest year for<br />

which data are available). This reflects increases<br />

in the prices charged for other industries’ products<br />

rather than a decrease in the for-hire transportation’s<br />

contribution to GDP. If constant<br />

dollars are used, the for-hire transportation’s<br />

value-added contribution to GDP actually increased,<br />

reflecting the smaller inflation in the<br />

prices <strong>of</strong> transportation services as well as their<br />

relatively higher productivities.<br />

Transportation-related GDP is undercounted<br />

from the industrial side because the value <strong>of</strong> private<br />

transportation is not included. Private transportation<br />

can be defined as transportation<br />

TABLE 2-4: CONTRIBUTIONS TO GROSS DOMESTIC PRODUCT (GDP): SELECTED INDUSTRIES<br />

1980 1990 1991 1992 1993 1980 1990 1991 1992 1993<br />

Billions <strong>of</strong> current dollars Billions <strong>of</strong> 1987 dollars<br />

GDP 2,708.0 5,546.1 5,724.8 6,020.2 6,343.3 3,776.3 4,897.3 4,867.6 4,979.3 5,134.5<br />

For-hire transportation 102.9 176.8 183.7 193.8 207.9 120.2 168.9 175.0 183.7 193.5<br />

Communications 68.9 146.7 154.2 162.1 169.8 94.4 140.8 148.2 153.8 158.9<br />

Health care 111.5 304.4 335.2 364.4 389.4 196.1 241.4 248.0 252.0 255.3<br />

Education 16.4 38.1 43.4 45.6 47.8 26.3 32.1 34.8 35.1 35.5<br />

Percentage <strong>of</strong> GDP Percentage <strong>of</strong> GDP<br />

For-hire transportation 3.8 3.2 3.2 3.2 3.3 3.2 3.4 3.6 3.7 3.8<br />

Communications 2.5 2.6 2.7 2.7 2.7 2.5 2.9 3.0 3.1 3.1<br />

Health care 4.1 5.5 5.9 6.1 6.1 5.2 4.9 5.1 5.1 5.0<br />

Education 0.6 0.7 0.8 0.8 0.8 0.7 0.7 0.7 0.7 0.7<br />

SOURCE: U.S. Department <strong>of</strong> Commerce, Bureau <strong>of</strong> Economic Analysis, “Survey <strong>of</strong> Current Business,” May 1993, <strong>table</strong>s 9 <strong>and</strong> 12; October 1994, <strong>table</strong> 2;<br />

April 1995, <strong>table</strong> 1.

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