doe eia 0581 98 distribution category uc 950 the national energy modeling system an overview 1998 february information administration office of integrated analysis and forecasting us department washington dc 20585 this report was prepared by independent statistical analytical agency within contained herein should be attributed to not construed as advocating or reflecting any policy position other organization ii preface provides a summary description nems which used generate forecasts production demand imports prices through year 2020 for annual outlook aeo98 0383 released in december 1997 presents markets five casesg26a reference case four additional cases that assume higher lower economic growth world oil than brief methodology scope each