But, provided that the returns are positive, such investments are still worth making. Given near-zero interest rates and idle workers, it is time for the state to undertake the rebuilding of infrastructure.
公共投资的用武之地正在于此。某些类型的投资可能无法获得私人投资者所要求的风险调整回报。但是，只要回报为正，这些投资就仍值得进行。在利率近零并且存在闲置工人的条件下，应该由国家承担基础设施的重建。