Abstract
Certificates of Public Advantage (COPAs) grant antitrust immunity to merging hospitals conditional on active state regulation. We investigate the effects of three mergers shielded with COPAs: Benefis in Great Falls, Montana, Palmetto in Columbia, South Carolina, and MaineHealth’s acquisition of Southern Maine Medical Center (SMMC). We find that Benefis’s and SMMC’s prices during the COPA period closely tracked controls, but the removal of each COPA led to a price increase. Most of SMMC’s quality measures also declined significantly after its COPA expired. Palmetto’s price closely tracked the average price of control hospitals in the initial COPA period and after the state renegotiated the COPA. The results illustrate that the removal of COPA regulation can lead to higher prices and reduced quality from unconstrained provider market power.
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