问题
单项选择题
Which of the following employment measures is most closely related to the level of real GDP（）
A. Labor force participation ratio.
B. Number of employed.
C. Aggregate hours.
答案
参考答案：C
解析：
Aggregate hours measure the total amount of labor performed in the economy. This measure captures changes in the number of people working and the effects of part-time work and overtime. Aggregate hours are related more closely to the level of real GDP than any of the other employment measures listed.