Does sharing the same religion, civilization or racial proximity lead to more peaceful relations between countries? This paper argues that cultural similarity can actually cause wars, which occur to combat di_usion. This new theory of war combines the models of Acemoglu and Robinson (2006) and...

We develop a principal-agent model to study fiscal capacity in pre-modern China and Japan. Before 1850, both nations were ruled by stable dictators who relied on bureaucrats to govern their domains. We hypothesize that agency problems increase with the geographic size of a domain. In a large...

A notable feature of post-World War II civil wars is their very long average duration. We provide a theory of the persistence of civil wars. The civilian government can successfully defeat rebellious factions only by creating a relatively strong army. In weakly-institutionalized polities this...

Modern political economies are distinguished from each other by the institutions that mediate actors’ interactions, falling somewhere along a spectrum between pure market and non-market mechanisms. But how did these institutions originally emerge? With regard to the financial sector, I argue...

We investigate how nondemocratic regimes use the military and how this can lead to the emergence of military dictatorships. Nondemocratic regimes need the use of force in order to remain in power, but this creates a political moral hazard problem; a strong military may not simply work as an...

There is controversy about whether geography matters mainly because of its contemporaneous impact on economic outcomes or because of its interaction with historical events. Looking at terrain ruggedness, we are able to estimate the importance of these two channels. Because rugged terrain hinders...

We present a general model of the interaction between settlement and the emergence of de facto property rights on frontiers prior to governments establishing and enforcing de jure property rights. Settlers have an incentive to establish de facto property rights to avoid the dissipation...

We studied the cyclical and growth properties of Brazilian per capita output from 1850 to 2000. Contrary to the experience of some developed countries, we did not find large changes in the volatility of per capita output. However, we obtained evidence that the oscillations in economic activity...

Using a newly assembled dataset spanning from 1820 to 1998, we study the relationship between the occurrence and magnitude of episodes of mass killing and the levels of development and democracy across countries and over time. Mass killings appear to be more likely at intermediate levels of...

Abstract: I apply the Beveridge-Nelson business cycle decomposition method to the time series of per capita murder in the State of Massachusetts. (1933-2005). Separating out “permanent” from “cyclical” murder, I hypothesize that the cyclical part coincides with documented waves of...