In a joint post the heads of the IMF and the World Bank have called for some form of global carbon pricing: “The transition to a cleaner future will require both government action and the right incentives for the private sector. At the center should be a strong public policy that puts a price on carbon pollution.”
The IMF leans more towards the use of carbon taxes and the Bank leans toward the use of cap-and-trade at the national level. But both seem to call for something like single global price that would guide these policies. However, it is perfectly clear that a global commitment to a carbon price would be idea for achieving their stated objectives.