In 2014, Synapse worked with Regional Economic Models, Inc. (REMI) on two projects to integrate Synapse’s in-house version of ReEDS, a detailed electricity sector optimization model developed by NREL, with REMI’s macroeconomic analysis tool, PI+. This integration gives a high-resolution view of the effect of changing energy prices and investment decisions on job creation, GDP, and income, as well as differential impacts by income group, industry, or region. Synapse and REMI analyzed both a nationwide and a Massachusetts-specific carbon tax.