Giving and promising gifts: Experimental evidence on reciprocity from the field.

We test the value of unconditional non-monetary gifts as a way to improve health worker performance in a low income country health setting. We randomly assigned health workers to different gift treatments within a program that visited health workers, measured performance and encouraged them to provide high quality care for their patients. We show that unconditional non-monetary gifts improve performance by 20 percent over a six-week period, compared to the control group. We compare the impact of the unconditional gift to one in which a gift is offered conditional on meeting a performance target and show that only the unconditional gift results in a statistically significant improvement. This demonstrates that organizations can improve the performance of health workers in the medium term without using financial incentives.