Mercer G W
Accid Anal Prev. 1987 Jun;19(3):231-6. doi: 10.1016/0001-4575(87)90007-8.
A correlational examination of 84 consecutive months of data on the frequency and severity of passenger vehicle casualty traffic accidents, unemployment rates, drinking driving, restraint device use and the driver demographics of driver age and driver gender suggested the following: Increases in unemployment levels remove young male drivers from the driving population, which in turn reduces the frequency of drinking driving and increases the proportion of restraint device use in this population. These changes combine to reduce both the frequency of casualty accidents per million driven kilometers and the severity of these accidents. However, the apparent relationship between changes in restraint device use and the frequency and severity of casualty accidents, and the apparent relationship between changes in drinking driving and the frequency of casualty accidents can be, to a great extent, a function of unemployment-driven changes in driver demographics.
对连续84个月有关乘用车伤亡交通事故的频率和严重程度、失业率、酒驾、约束装置使用情况以及驾驶员年龄和性别等驾驶员人口统计学数据的相关性研究表明：失业率上升使年轻男性驾驶员退出驾驶人群，这进而降低了酒驾频率，并增加了该人群中约束装置的使用比例。这些变化共同作用，降低了每百万行驶公里伤亡事故的频率及其严重程度。然而，约束装置使用变化与伤亡事故频率和严重程度之间的明显关系，以及酒驾变化与伤亡事故频率之间的明显关系，在很大程度上可能是失业率驱动的驾驶员人口统计学变化的一种表现。
