贴现率的提高对货币供给的影响是模棱两可的，因为它使经济中高能货币的数量减少，但又使货币乘数提高。这一观点是否正确？试作解释。 The effect of an increase in the discount rate on the money supply is ambiguous because it reduces the amount of high—powered money in the economy but increases the value of the money multiplier．True or false？Explain．