One is that adjustment is lengthy, because old jobs go quickly but new ones can take a long time to replace them. Public policies are needed both to accelerate the process and to alleviate human suffering.
但也有注意事项。其一是调整过程十分漫长，因为老的工作很快就被消灭，而新工作替代旧工作需要的时间却很长。加速上述进程并减轻人类痛苦的公共政策因此非常必要。