On February 9, the Center for Health Policy at Brookings will present new research and insights derived from fieldwork conducted by the ACA Network, a joint project of Brookings and the Rockefeller Institute of Government. The research focused on the extent and nature of competition in the ACA marketplaces in five large states. Field researchers will discuss successes, failures, and needed improvements in market competition in California, Florida, Michigan, North Carolina, and Texas. The presentation will be followed by a panel of state-level experts and national leaders in health policy who will react to the findings and try to answer the question: What comes next? Participants will take questions from the audience, and the event will be webcast live. You can join the conversation on Twitter at #ACAMarkets.