Wasteful Interviews in Matching Markets

In the National Resident Matching Program, doctors and hospitals submit their preferences to a clearinghouse, who finds a stable matching with respect to the submissions. This matching might not be stable with respect to the true preferences since participants rank only the potential partners with whom they had interviewed [Echenique et al., 2021]. At the same time, agents participate in wasteful interviews and in doing so they miss other interview opportuni- ties. That is, planned interviews take place, even though previous interviews guarantee a match with a better candidate for at least one of the participants involved. We show how an intervention of the clearinghouse during the in- terview stage can help participants identify wasteful interviews and improve the stability of the implemented match. We also show that such improvement does not come at the expense of Pareto efficiency