1. How many of the uninsured can purchase a marketplace plan for less than their shared responsibility penalty? Author(s): Rae, Matthew, authorLevitt, Larry, authorSemanskee, Ashley, author Publication: Menlo Park, CA : Henry J. Kaiser Family Foundation, November 2017 Subject(s): Cost Sharing -- economicsCost Sharing -- statistics & numerical dataHealth Insurance Exchanges -- economicsHealth Insurance Exchanges -- statistics & numerical dataInsurance Coverage -- economicsInsurance Coverage -- statistics & numerical dataTaxesHumansUnited StatesUnited States.