This study assesses the factors influencing the movement of people across health plans. We distinguish three types of cost-related transitions: adverse selection, the movement of the less healthy to more generous plans; adverse retention, the tendency for people to stay where they are when they...

In this paper, we examine the growth in medical care spending by age over the past 40 years. We show that between 1953 and 1987, medical spending increased disproportionately for infants, those under 1 year, and the elderly, those 65 and older. Annual spending growth for infants was 9.8 percent...