This paper estimates time-varying COVID-19 reproduction numbers worldwide solely based on the number of reported infected cases, allowing for under-reporting. Estimation is based on a moment condition that can be derived from an agent-based stochastic network model of COVID-19 transmission. The...

Why did per capita income divergence occur so dramatically during the 19th Century, rather than at the outset of the Industrial Revolution? How were some countries able to reverse this trend during the globalization of the late 20th Century? To answer these questions, this paper develops a...