问题
单项选择题
An analyst does research about total, marginal and average product curve of labor. As more labor is hired, which of the following curves initially increases and then decreases
A. The average product of labor curve, but not the total and marginal product of labor curve.
B. The marginal product of labor curve, but not the total and average product of labor curve.
C. Both the marginal product of labor and the average product of labor curve, but not the total product of labor curve.
答案
参考答案：C
解析： 当越来越多的工人被雇用时，劳动力的边际产出和平均产出起初都会上升，但到了高点之后都会曲线下降，同时边际产出会穿过平均产出的最高点。另外，虽然劳动力的边际产出最终会递减，但只要大于零，劳动力的总产出总是增加的。