In emerging and developing economies, the gap between actual and necessary infrastructure investment is estimated at several trillion dollars per year. That gap is growing wider with climate change, right when governments have lost the financial capacity to close it. Fiscal accounts are deep in the red. Public debt—which was already heavy before the pandemic—has since ballooned. So the task of building the roads, ports, power-plants, sanitation systems, telecoms and other services that people need must be shared with the private sector. The question is: what type of contracts and instruments can be put in place to channel private capital into infrastructure? How can that be done in a sustainable way---environmentally and fiscally? How should the contingent liabilities behind public-private partnerships be monitored? How can we coordinate the sub-national governments and SOEs that enter arrangements with private companies for infrastructure projects? This Workshop provides answers from the perspective of practitioners. It looks at funding models, ownership options, contingent arrangements, risk sharing, institutional accountability, contract management, operational oversight, and market trends. It reviews actual country experiences---what has worked, what has not, and why. And it explores the latest ideas to solve a problem that is not only important but urgent.