That brings us to the third factor behind the global economy's anemic performance: underinvestment, particularly by the public sector. In the US, infrastructure investment remains suboptimal, and investment in the economy's knowledge and technology base is declining, partly because the pressure to remain ahead in these areas has waned since the Cold War ended.
这就引出了全球经济表现低迷背后的第三个因素：投资不足，特别是公共部门投资不足。在美国，基础设施投资仍没有达到最优，其经济的知识和技术基础投资正在下降，部分是因为自冷战结束以来，在这些领域保持领先的压力有所放松。至于欧洲，它一直受困于公共债务过高和财政状况不稳。