These ndings suggest that while consumer inattention, and the extra weight placed on premiums
and coverage by enrollees experiencing related shocks, explain some of the choice frictions
identied in the previous literature, some other sources of overspending remain. For example
consumers display a substantial willingness-to-pay for access to particular brands. In the counterfactual
analyses below we explore the implications of these ndings for the cost savings derived
from policies that reduce consumer inattention relative to policies that address the other frictions
as well. Before conducting these analyses, however, we consider the supply side of the market