This book lays out a range of policy actions that are needed at the various phases of the demographic transition and uses global and regional experiences to provide evidence on what has worked and what has not. Countries have a menu of options available to speed up the transition, improve...

Between 2000 and 2050, the share of the population aged 60 and over is projected to increase in every country in the world. Although labor force participation rates are projected to decline from 2000 to 2040 in most countries, due mainly to changes in their age distributions, labor force-...

Health is a direct source of human welfare and also an instrument for raising income levels. The authors discuss a number of mechanisms through which health can affect income, focusing on worker productivity, children's education, savings and investment, and demographic structure. As well as the...

Declines in child mortality, followed by declines in fertility, produce a youth bulge generation and a period when a country has a large number of working age people and a smaller number of dependents. If gainfully employed, a large number of workers per capita gives a boost to the economy. The...

The authors estimate social rates of return to electricity-generating capacity and paved roads, relative to the return on general capital, by examining the effect on aggregate output and comparing that effect with the costs of construction. They find that both types of infrastructure capital are...

We develop a life-cycle model of optimal retirement and savings behavior under complete markets. Our model explains the long-run decline in the age of retirement as an income level effect, with higher wage growth and lower interest rates tending to increase the retirement age. We show that...

In many applications in applied statistics, researchers reduce the complexity of a data set by combining a group of variables into a single measure using a factor analysis or an index number. We argue that such compression loses information if the data actually have high dimensionality. We...

We develop an optimizing life-cycle model of retirement with perfect capital markets. We show that longer healthy life expectancy usually leads to later retirement, but with an elasticity less than unity. We calibrate our model using data from the US and find that, over the last century, the...