energy and minerals industries in national regional state economies united states department of agriculture forest service products laboratory general technical report fpl gtr 95 deborah j shields susan a winter gregory s alward kathy l hartung 1 contents page introduction basic input output modeling 2 direct requirements leontief inverse tables multipliers 3 limiting assumptions caveats 7 structural analysis aggregation schemes 8 description 9 data base year statistics for sectors interest 11 gross product 12 interpretation gsp 13 i o 14 references appendix mathematics 16 b implan 19 c 25 d industry 54 e 71 abstract this presents information on the contribution extractive to domestic economy at different geopolitical scales areas where resource production is important or employment income are highlighted value added personal total reported