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Giuseppe Carone and Declan Costello

The Economics of Demographics provides a detailed look at how the biggest demographic upheaval in history is affecting global development. The issue explores demographic change and the effects of population aging from a variety of angles, including pensions, health care, financial markets, and migration, and looks specifically at the impact in Europe and Asia. Picture This looks at global demographic trends, while Back to Basics explains the concept of the demographic dividend. Country Focus spotlights Kazakhstan, while People in Economics profiles Nobel prize winner Robert Mundell. IMF Economic Counsellor Raghuram Rajan argues for further change in India's style of government in his column, Straight Talk.

Jiaxiong Yao
Past studies on the relationship between electricity consumption and temperature have primarily focused on individual countries. Many regions are understudied as a result of data constraint. This paper studies the relationship on a global scale, overcoming the data constraint by using grid-level night light and temperature data. Mostly generated by electricity and recorded by satellites, night light has a strong linear relationship with electricity consumption and is correlated with both its extensive and intensive margins. Using night light as a proxy for electricity consumption at the grid level, we find: (1) there is a U-shaped relationship between electricity consumption and temperature; (2) the critical point of temperature for minimum electricity consumption is around 14.6°C for the world and it is higher in urban and more industrial areas; and (3) the impact of temperature on electricity consumption is persistent. Sub-Saharan African countries, while facing a large electricity deficit already, are particularly vulnerable to climate change: a 1°C increase in temperature is estimated to increase their electricity demand by 6.7% on average.