model across treatment regimens and show that detailing for one drug can increase demand for other drugs that are often … combined with the focal drug. Such spillover effects could lead to free riding by the drugs benefitting from the spillover. We …

against consumer surplus losses from restricted access. Recently, many prescription drug plans utilize preferred pharmacy … networks to reduce drug prices. Our results suggest that Medicare Part D plans with preferred pharmacy networks pay lower … retail drug prices, while subsidized enrollees' insensitivity to preferred pharmacy cost-sharing discounts reduces these …