This document discusses various methods of credit control used by central banks, including bank rate policy, open market operations, and cash reserve ratios. It provides details on how each method works and its effects. Bank rate policy involves the central bank setting a rate at which it lends to commercial banks, influencing other market interest rates. Cash reserve ratios set a minimum amount of reserves commercial banks must hold, affecting their ability to lend. Both seek to influence the money supply and cost of credit to ultimately impact economic activity and prices. The document compares these two methods and notes each has strengths and limitations, recommending central banks combine multiple approaches for effective credit control.