This area provides information and documentation on EPA’s application of the Integrated Planning Model (IPM) to analyze the impact of air emissions policies on the U.S. electric power sector. EPA has used multiple iterations of the IPM model in various analyses of regulations and legislative proposals. For the development of its latest power sector modeling platform, EPA has increased its external engagement with state air quality planning officials, power company representatives, regional transmission organizations, and others who have provided input on the data, assumptions, and structure of EPA's Power Sector Modeling Platforms.