"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).",,,,,
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