doe eia m059 model documentation petroleum market of the national energy modeling system january 31 1997 oil and gas analysis branch supply conversion division office integrated forecasting information administration nems page i table contents section number acronyms abbreviations v 1 introduction purpose this report 2 summary 3 archival citation 4 organization objectives relationship to other models overview rationale philosophical or theoretical approach comparison with module fundamental assumptions alternative approaches reasons for selection 8 5 pseudodata econometric equation 6 linear approximation 9 7 abbreviated programming 10 detailed 12 structure main subroutines matrix preprocessing 18 postprocessing