The Impacts of Algorithmic Work Assignment on Fairness Perceptions and Productivity: Evidence from Field Experiments

Problem definition: We study how algorithmic (versus human-based) task assignment processes change task recipients’ fairness perceptions and productivity. Academic/practical relevance: Since algorithms are widely adopted by businesses and often require human involvement, understanding how humans perceive algorithms is instrumental to the success of algorithm design in operations. Particularly, the growing concern that algorithms may reproduce inequality historically exhibited by humans calls for research about how people perceive the fairness of algorithmic decision making (relative to traditional human-based decision making) and, consequently, adjust their work behaviors. Methodology: In a 15-day-long field experiment with Alibaba Group in a warehouse where workers pick products following orders (or “pick lists”), we randomly assigned half of the workers to receive pick lists from a machine that ostensibly relied on an algorithm to distribute pick lists, and the other half to receive pick lists from a human distributor. Results: Despite that we used the same underlying rule to assign pick lists in both groups, workers perceive the algorithmic (versus human-based) assignment process as fairer by 0.94–1.02 standard deviations. This yields productivity benefits: receiving tasks from an algorithm (versus a human) increases workers’ picking efficiency by 15.56%–17.86%. These findings persist beyond the first day when workers were involved in the experiment, suggesting that our results are not limited to the initial phrase when workers might find algorithmic assignment novel. We replicate the main results in another field experiment involving a nonoverlapping sample of warehouse workers. We also show via online experiments that people in the United States also view algorithmic task assignment as fairer than human-based task assignment. Managerial implications: We demonstrate that algorithms can have broader impacts beyond offering greater efficiency and accuracy than humans: introducing algorithmic assignment processes may enhance fairness perceptions and productivity. This insight can be utilized by managers and algorithm designers to better design and implement algorithm-based decision making in operations. Supplemental Material: The e-companion is available at https://doi.org/10.1287/msom.2022.1120 .