Editor-in-chief Alan Weil notes in his editor's letter: "We didn’t plan it this way, but this month’s Health Affairs could have been called the myth-busting issue. Whenever a complex piece of legislation is enacted—and the Affordable Care Act (ACA) certainly falls into that category—one can anticipate that there will be unanticipated consequences. Many of the papers in this issue seek to determine whether or not some of the likely consequences of the law have come to pass."

This issue of Health Affairs also includes an evaluation of a program in Iowa intended to promote healthy behaviors among Medicaid enrollees, several studies on care delivery approaches aimed at achieving cost and quality goals, and better serving complex and rural populations, and more on physician payment and practice, children's health, and global health. See the full issue here.