Another measure of the efficiency of investment is the incremental capital-output ratio (ICOR): the investment needed to generate an additional unit of output, measured as annual investment divided by the annual increase in GDP.

• 对投资效率的另一种衡量是投资产出增量比：即每增加一单位产出所需的资本量，以用年度投资额除以GDP的年增量来计算。