What obstacles prevent the most productive technologies from spreading to less developed economies from the world … distances between populations, and document how such distances, relative to the world’s technological frontier, act as barriers …

the rise and decline of nations - both in theory and in a large number of case studies …

, written by distinguished economists and economic historians, use economic theory and historical cases to explore how and why … "history matters." The chapters, which range in subject matter from the economic theory of irreversible investment to the … integrating economic theory into historical research in the gathering and interpretation of data …