During the 1974–2004 period, energy economics coalesced around the microeconomic view that energy demand is a derived input in final production, with energy prices guiding input choices and output levels. Researchers increasingly used formal models that connect energy markets to firm behavior, technology, and macro outcomes, and emphasized scenario analysis and cross-country forecasting to inform policy debates on efficiency, security, and innovation. Methodologies shifted toward integrating demand analysis with intertemporal and policy instruments, creating a cohesive framework for evaluating energy–economy interactions.