By this point, Phelps had already acquired an international reputation through his work on the golden rule of capital accumulation (he was 28). This concept now appears in the toolbox of every economist, is taught in all classes on growth, and serves as a reference in all works on the macro economy.
到那个时候，菲尔普斯已经通过有关资本累计的黄金法则的研究获得了国际声誉。当时他只有28岁。这一概念现在出现在每个经济学家的工具盒里，所有有关经济增长的课程都讲授这一概念，而且所有有关宏观经济的研究工作都引用这一理论。