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Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

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Table 4.33<br />

RATIO ESTIMATES<br />

Commodity Group bm/b r y 2 /y 1<br />

STCC 26<br />

Pulp, Paper and Allied Products .182 1.929<br />

STCC 29<br />

Petroleum and Coal Products 1.000 1.000<br />

STCC 30 ,<br />

Rubber and Miscellaneous<br />

Plastics Products .201 4.325<br />

STCC 32<br />

Stone Clay and Glass Products .375 .750<br />

. STCC 23<br />

Apparel and Related Products • .029 . 1.494.1<br />

STCC 35<br />

Machinery, except Electrical 1.258 1.107:<br />

.STCC 36 .<br />

Electrical Machinery and Equip<br />

Equipment. .282 1.489<br />

The Three-Mode Model<br />

STCC 37<br />

•<br />

Transportation Equipment 1.989 2.194<br />

The three-mode model, relating rail, motor and water transport,<br />

was then estimated <strong>for</strong> STCC Group 29, PetroleUm and Coal Products.<br />

This model has been developed previously and was presented in equa-<br />

tions (4.22) through (4.28). The rate equations were first estimated.<br />

Parameter estimates and related statistics <strong>for</strong> these equations are<br />

presented in Table 4.36. The reduced <strong>for</strong>m of the remaining structural<br />

equations was then derived.and the demand equations were estimated.<br />

These estimates are contained in Table 4.34. .<br />

•<br />

141

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