Marginal Cost:A New Explanation of Labor Force Supply Curve
边际成本:劳动力供给曲线的重新解释

In the current theories of labor economics,researchers attempt to use marginal utility theory to deduce the labor force supply curve. In this article,however,the writer argues that marginal utility theory can only be used to deduce labor(work time)supply curve,but not labor force supply curve.Labor force is a kind of product and its production needs costs.Thus using marginal cost theory to explain labor for supply curve is reasonable.It is not only feasible in theory ,but also can be supported by evidence.