unit labor cost is stable

问题如下：

Q. If relative to prior values of their respective indicators, the inventory–sales ratio has risen, unit labor cost is stable, and real personal income has decreased, it is most likely that a peak in the business cycle:

选项：

A.has occurred. B.is just about to occur. C.will occur sometime in the future.

解释：

A is correct. Both inventory–sales and unit labor costs are lagging indicators that decline somewhat after a peak. Real personal income is a coincident indicator that, by its decline, shows a slowdown in business activity.

A正确。库存销售和单位劳动力成本都是滞后指标，在经济达到峰值后有所下降。实际个人收入是一个同步指标，它的下降表明商业活动放缓。