This paper examines data on urbanization. We review the most commonly used data sources, and highlight the difficulties inherent in defining and measuring the size of urban versus rural populations. We show that differences in the measurement of urban populations across countries and over time...

The COVID-19 pandemic has forced countries to make difficult ethical choices, e.g., how to balance public health and socioeconomic activity and whom to prioritize in allocating vaccines or other scarce medical resources. We discuss the implications of benefit-cost analysis, utilitarianism, and...

This paper investigates challenges of aging for long-term care. Our analysis proceeds in three steps. In the first step, we estimate the prospective care demand for 30 developed countries based on projected aging and disabilities among the elderly. In the second step, we outline challenges for...