NO.PZ2023010401000093
问题如下：
Based on typical labor utilization patterns across the business cycle, productivity (output per hours worked) is most likely to be highest选项：
A.at the peak of a boom. B.into a maturing expansion. C.at the bottom of a recession.解释：
At the end of a recession, firms will run "lean production" to generate maximum output with the fewest number of workers.不理解为什么bottom of recession时工作效率最高，至少从indicator的角度看，只有average weekly hours是leading factor，没说productivity.
考虑productivity的时候不应该考虑capital等等其他生产要素吗？而capacity utilization在expansion的时候持续增长，那productivity是不是在expansion更高呢？
