Global gatherings from Addis Ababa to Glasgow are setting targets from climate through health and education to energy and transport that call for a lot of investment for sustainable development. But how much you can afford to invest depends on how much you’re paying for it. And that’s where the simp...

We present data on the global diffusion of technologies over time, updating and adding to Comin and Mestieri’s "CHAT" database. We analyze usage primarily based on per capita measures and divide technologies into the two broad categories of production and consumption. We conclude that there has been...

This paper explores the historical record in the development and deployment of vaccines globally and puts the COVID-19 vaccine rollout in that context. Although far more can be done and should be done to speed equitable access to vaccines in the COVID-19 response, it is worth noting the revolutionar...

The first age of pandemics followed in the wake of farming, cities and trade, because infections leverage proximity and numbers to survive and evolve. After millennia of mass mortality, followed by two centuries of progress against plagues driven by sanitary and medical revolutions, will we allow a ...

Based on UN projections from the period 2015 to 2050, Rebekah Smith and Farah Hani have calculated that prime working-age populations of OECD countries will shrink by more than 92 million people while there will be nearly 1.4 billion new working-age people in developing countries. This note updates ...

The purpose of a nation’s power sector is to deliver reliable electricity at the lowest cost and for the greatest benefit. At the heart of any private electricity generation project is a Power Purchase Agreement (PPA), a contract that contains key provisions such as price, payment stipulations, and ...

Most differences in global aid allocation cannot be explained using our measures of need, humanitarian demand, capacity and donor relations in a simple linear regression model.