In a competitive economy without risk or inflation, the competitive rate of return on capital would be equal to the market interest rate. The market interest rate serves two functions: It rations out society’s scarce supply of capital goods for the uses that have the highest rates of return, and it induces people to sacrifi ce current consumption in order to increase the stock of capital.
这是书上的原话，书上一再提 the market interest rate，但却没说这是老百姓在银行存款的利率，还是银行向外贷款的利率。是哪个啊？为什么？