I am an energy policy and economics researcher. My work consists of modeling energy systems. I developed most of the sectors in the KAPSARC Energy Model, which represents the Saudi energy system; those sectors are the electric power generation and transmission systems, the petrochemicals and fertilizers sectors, cement production, and oil refining. My recent work includes developing a residential electricity use model that considers behavioral response. My peer-reviewed work is summarized at https://www.researchgate.net/profile/Walid_Matar.