Think tanks play a critical role in influencing policy discourses through evidence-based analysis and ideation. Since 2005, the Center for Study of Science, Technology and Policy (CSTEP) has been working with various governments to address long-term issues in key areas such as energy, climate, and health. CSTEP has developed a wide range of computational tools using inter-disciplinary methods to assist governments in examining and improving the efficacy of policies, especially in the energy sector.