This paper revisits the debate about the appropriate differential equation that governs the evolution of knowledge in models of endogenous growth. We argue that the assessment of the appropriateness of an equation of motion should not only be based on its implications for the future, but that it...

World population -- Population data -- Population distribution and composition -- Fertility -- Mortality -- Internal migration -- International migration flows : immigrants and transnational migrants -- Refugees and internally displaced persons -- Urbanization -- Population policies --...

"This text provides a comprehensive introduction to population geography, grounding students in the tools and techniques that are commonly used to describe and understand population concepts. Arguing that an understanding of population is essential to prepare for the future, Newbold provides...

Can directed technical change be used to combat climate change? We construct new firm-level panel data on auto industry innovation distinguishing between dirty (internal combustion engine) and clean (e.g. electric and hybrid) patents across 80 countries over several decades. We show that firms...