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Do Supply-Side Forces Explain Geographic Variation in Health Care Use?

Regional variation in health care utilization has been well-documented, yet uncertainty persists about whether this variation is primarily the result of supply-side or demand-side forces. We provide new evidence on this issue by examining changes in health care use for the near-elderly as they transition from being uninsured into Medicare. Results support a causal, supply-side explanation of regional variation. Estimates indicate that gaining Medicare coverage in above-median spending regions increases the probability of at least one hospital visit by 40% and the probability of having more than five doctor visits by 26% relative to similar individuals in below-median spending regions.

This report is part of the RAND Corporation external publication series. Many RAND studies are published in peer-reviewed scholarly journals, as chapters in commercial books, or as documents published by other organizations.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.

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Regional variation in health care utilization has been well-documented, yet uncertainty persists about whether this variation is primarily the result of supply-side or demand-side forces. We provide new evidence on this issue by examining changes in health care use for the near-elderly as they transition from being uninsured into Medicare. Results support a causal, supply-side explanation of regional variation. Estimates indicate that gaining Medicare coverage in above-median spending regions increases the probability of at least one hospital visit by 40% and the probability of having more than five doctor visits by 26% relative to similar individuals in below-median spending regions.

This report is part of the RAND Corporation external publication series. Many RAND studies are published in peer-reviewed scholarly journals, as chapters in commercial books, or as documents published by other organizations.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.

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