In most studies on hospital merger effects, the unit of observation is the merged hospital, whereas the observed price is the weighted average across hospital products and across payers. However, little is known about whether price effects vary between hospital locations, products, and payers. We expand existing bargaining models to allow for heterogeneous price effects and use a difference-in-differences model in which price changes at the merging hospitals are compared with price changes at comparison hospitals. We find evidence of heterogeneous price effects across health insurers, hospital products and hospital locations. These findings have implications for ex ante merger scrutiny.

Additional Metadata
Keywords hospital merger, hospital–insurer bargaining, retrospective merger analysis
Persistent URL dx.doi.org/10.1002/hec.3920, hdl.handle.net/1765/117901
Journal Health Economics
Citation
Roos, A.-F, Croes, R, Shestalova, V, Varkevisser, M, & Schut, F.T. (2019). Price effects of a hospital merger: Heterogeneity across health insurers, hospital products, and hospital locations. In Health Economics. doi:10.1002/hec.3920