Transforming Health Care Through Evidence and Collaboration
Transforming Health Care Through Evidence and Collaboration

This methodological paper investigates the strengths and weaknesses of data sources that might be used to study hospital ownership of physician practices. Focusing on the two most promising sources, from SK&A and the American Hospital Association, the authors document differences in estimates arising from each source and discuss likely reasons for the differences, concluding that a researcher's choice of data source and measure of integration will depend on the research question under study.