Objective: To study how changes in insurance benefit design affect medication use of older adults with mental disorders.Data sources: US Medicare claims data from 2007 to 2018.Study Design: We focus on the gradual elimination of the Medicare prescription drug coverage gap beginning in 2011, and...

Consumers' health plan choices are highly persistent even though optimal plans change over time. This paper separates two sources of inertia, inattention to plan choice and switching costs. We develop a panel data model with separate attention and choice stages, linked by heterogeneity in...