PMI is the successor program to the World Bank’s successful Partnership for Market Readiness (PMR) effort that, from 2011 to 2021, supported emerging economies and developing countries to design and deploy carbon pricing and market instruments to facilitate the reduction of emissions. PMR provided funding and technical assistance to 23 countries, accounting for 46% of global greenhouse gas emissions, all of whom now have the basic nuts and bolts for establishing a carbon pricing system.