Individuals aged 65 years and older currently make up a larger share of the population than ever before, and this group is predicted to continue growing both in absolute terms and relative to the rest of the population. This chapter begins by introducing the facts, figures, and forecasts...

The COVID-19 virus, also known as the coronavirus, is currently spreading around the world. While a growing literature suggests that exposure to pollution can cause respiratory illness and increase deaths among the elderly, little is known about whether increases in pollution could cause...

Section I of this chapter briefly reviews the literature on medical spending, which suggests that health expenditures began small but steadily increased throughout history (from 1 percent to 4 percent of GDP), then began to increase rapidly among wealthier developed countries after 1950. Section...