The Affordable Care Act (ACA) marked a historic expansion of access to health care for many people, and the federal and state exchanges will be a large part of that reform. Ideally, low- and middle-income consumers will buy insurance with subsidies through online health benefit exchanges, where they can compare the price, quality, and benefits of competing plans. Millions of those consumers will be young adults. However, in order for the ACA to reach its true potential, states and the federal government must engage in active outreach to those without coverage to ensure that they take...