The Morale Effects of Pay Inequality*
通过印度制造业工人的实地实验发现，当同事生产率难以观察时，薪酬不平等会降低产出和出勤率，并削弱合作；但若高薪者明显更高效，则无负面影响。
Relative-pay concerns have potentially broad labor market implications. In a month-long experiment with Indian manufacturing workers, we randomize whether coworkers within production units receive the same flat daily wage or differential wages according to their (baseline) productivity ranks. When coworkers’ productivity is difficult to observe, pay inequality reduces output by 0.45 standard deviations and attendance by 18 percentage points. It also lowers coworkers’ ability to cooperate in their own self-interest. However, when workers can clearly perceive that their higher-paid peers are more productive than themselves, pay disparity has no discernible effect on output, attendance, or group cohesion. These findings help inform our understanding of when pay compression is more likely to arise in the labor market