U.S. Energy Information Administration
Projecting the world's energy, annually
The question: a defensible, repeatable global outlook. What we built: SAGE, the first global MARKAL model, and later IEMM, our first fully parameter-driven model. What changed: five editions of the International Energy Outlook (2003–2007) ran on SAGE; IEO 2019's electricity analysis ran on IEMM — global projection became an annual production process, not a one-off study. [verify framing w/ EIA public record]
