Table A1: Estimates of Annual Domestic Commodity Inflows to Massachusetts

Table A1: Estimates of Annual Domestic Commodity Inflows to Massachusetts

Excluding energy1

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Commodity Observed
inflows
(000s of metric tons)
Estimated
inflows
(000s of metric tons)
Percentage
error
Distance
ratio2
Apparel or other finished textile products 238 204 -16.8 0.8
Chemicals or allied products 3,332 2,519 -32.3 1.1
Clay, concrete, glass, or stone products 1,512 1,777 14.9 1.4
Electrical machinery, equipment, or supplies 276 269 -2.6 1.3
Fabricated metal products 644 585 -10.1 0.7
Farm products 259 228 -13.5 1.6
Food or kindred products 6,931 6,682 -3.7 1.3
Furniture or fixtures 244 219 -11.5 1.3
Instruments, photographic goods, optical goods, watches, or clocks 33 26 -26.5 1.1
Leather or leather products 41 36 -13.2 N/A
Lumber or wood products, excluding furniture 1,340 1,013 -32.3 4.5
Machinery, excluding electrical 221 195 -13.6 N/A
Miscellaneous products or manufacturing 333 269 -23.9 1.1
Primary metal products 1,051 1,351 22.2 1.0
Pulp, paper, or allied products 2,713 2,395 -13.2 1.3
Rubber or miscellaneous plastics products 557 483 -15.2 1.5
Textile mill products 391 337 -15.9 N/A
Transportation equipment 903 578 -56.1 1.1
Waste or scrap materials 32 36 10.7 N/A
Total, all commodities 21,052 19,203 -9.6 1.1
Weighted average error: 16.8%
Mean absolute error: 15.6%

1 Energy commodities include mining, petroleum, and coal products.

2 Distance ratio is the average shipment distance for the commodity to the state divided by the national average.

Key: N/A = not applicable.

Note: Observed inflows are obtained from the 1993 Commodity Flow survey. Estimates are derived from the inflows to the six-state Northeastern Region (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont).