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Abstract
I exploit the age-based eligibility structure of Medicare and the age gap between
spouses to examine the impact of Medicare eligibility of an older spouse on the insurance
coverage of younger, Medicare-ineligible spouses. Using a regression discontinuity
framework, I find that Medicare eligibility of an older spouse can crowd-out the health
insurance coverage of a younger spouse. Medicare eligibility of older wives increases
the likelihood that younger husbands are uninsured. Younger wives are less likely
to be covered through an employer-based plan and more likely to have non-group coverage
after an older husband turns 65.