Energy Modelling Studies and Conservation documents the proceedings of seminar of the United Nations Economic Commission for Europe held in Washington D.C., on 24-28 March 1980. The volume begins with a Seminar Theme Paper that identifies background policy issues that lead to modeling; discusses points of view involved in energy policy modeling; defines the context of a set of energy conservation problems or questions being analyzed; and provides a forward-looking view of the subject and its problems. This is followed by 54 papers that are organized into three main topics: (1) energy models of major interest to individual countries; (2) the interaction between energy conservation measures and the economy; and (3) the international aspects of energy conservation models. The papers on Topic 1 cover forecasting methodologies, demand and conservation studies, and electricity and supply studies. The papers on Topic 2 present the experiences in countries such as Norway, UK, the USSR, and US. The papers on Topic 3 include studies on energy conservation policies in France, Germany, and Italy; and the MARKAL multi-period linear programming model for joint research and development in the field of new energy technologies of the 17 countries of the International Energy Agency.