Table A1: Estimates of Annual Domestic Commodity Inflows to Massachusetts
Table A1: Estimates of Annual Domestic Commodity Inflows to Massachusetts
Excluding energy1
| 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).