\[pq = wL + rK\]
\[w = p\times \frac{\partial Q}{\partial L} = (wL + rK)\times \frac{\partial Q}{\partial L} \times \frac{1}{Q}\]
[LaTex]w = rK \times \frac{\partial Q}{\partial L} \times \frac{1}{Q}/[1-\frac{\partial Q/Q}{\partial L/L}][/LaTex]
显然，当L上升时，工资是上升的，即边际产值上升。