doe eia m057 99 integrating module of the national energy modeling system model documentation december 1998 office integrated analysis and forecasting information administration us department washington dc 20585 this report was prepared by independent statistical analytical agency within contained herein should not be construed as advocating or reflecting any policy position other organization nems reportii contents ii tables v figures 1 introduction scope archival citation 2 overview structure 3 regional detail 4 time horizon major assumptions 6 modular modularity 7 coordination modules data 10 11 alternative approaches to an methodology 12 conclusions on design considerations 17 summary component 19 macroeconomic activity international 20 household expenditures residential commercial demand industrial transportation 21 electricity market renewable fuels oil gas supply natural transmission