Hinting at the fourth interest rate cut this year, RBI Governor Raghuram Rajan has said he is not done with lowering rates and the central problem for the entire world remains slowing economic growth. Rajan, who was participating in the elite Jackson Hole economic symposium of the Kansas City Federal Reserve, also said RBI has reached an agreement with the government on a new rate-setting panel, the Monetary Policy Committee, which would be announced soon.