Before revision:  We test our large market predictions with kidney exchange data from the National Kidney Registry (NKR). Numerical simulations show that, in line with our predictions, the greedy policy matches patient-donor pairs significantly faster (roughly 20-30 days) than other commonly used policies and at most 1 \\%DIF < percent fewer pairs than the patient policy.
After revision:  We test our large market predictions with kidney exchange data from the National Kidney Registry . Greedy matching achieves as many transplants as commonly-used policies (1.6 \\%DIF < percent fewer pairs than the patient policy.