Patterns of political unification and fragmentation have crucial implications for comparative economic development. Diamond (1997) famously argued that “fractured land” was responsible for China's tendency toward political unification and Europe's protracted political fragmentation. We build...

This paper studies the causes and consequences of political centralization and fragmentation in China and Europe. We argue that a severe and unidirectional threat of external invasion fostered centralization in China while Europe faced a wider variety of smaller external threats and remained...

Patterns of political unification and fragmentation have crucial implications for comparative economic development. Diamond (1997) famously argued that "fractured land" was responsible for China's tendency toward political unification and Europe's protracted political fragmentation. We build a...

We provide a new framework to account for the diverging paths of political development and state building in China and Japan during the second half of the nineteenth century. The arrival of Western powers not only brought opportunities to adopt new technologies, but also fundamentally threatened...

Patterns of state formation have crucial implications for comparative economic development. Diamond (1997) famously argued that “fractured land” was responsible for China’s tendency toward political unification and Europe’s protracted polycentrism. We build a dynamic model with granular...

How does sea power differ from land power? We introduce a formal model that explains several characteristics of sea power. Specifically, sea power is more highly concentrated than land power; it follows cycles; and is characterized by periodic intensification of arms competition. We account for...