Does economic inequality diminish the capacity of democracies to extract voluntary sacrifice? And does inequality undermine citizen's willingness to do their civic duty when the state is under threat? We address these questions by linking income inequality with people's willingness to fight for...

We analyze wartime prosthetic device patents to investigate how demand and procurement policy can shape medical innovation. We use machine learning tools to develop new data describing the aspects of medical and mechanical innovations that are emphasized in patent documents. Our analysis of...

The use of bribes to co-opt an enemy's forces can be a more effective way to wage war than the conventional use of force: Relative to bombs, bribes can save lives and resources, and preserve civic institutions. This essay evaluates the efficacy and normative desirability of selectively...

After the 2014 uprising against widespread corruption under former Ukrainian President Victor Yanukovych, a group of civic activists and data experts decided to overhaul government procurement. Their efforts produced an open-source e-procurement system, ProZorro (“transparency” in...

We analyze wartime prosthetic device patents to investigate how demand and procurement policy can shape medical innovation. We use machine learning tools to develop new data describing the aspects of medical and mechanical innovations that are emphasized in patent documents. Our analysis of...

A multi-stage model on the course of war is presented: Individual battles are modeled as private value all-pay auctions with asymmetric combatants of two opposing teams. These auctions are placed within a multi-stage framework with a tug-of-war structure. Such framing provides a microfounded...

Using a data set of historical battles from 1600 to 1973, this paper analyzes the empirical determinants of tactical success in modern war. Based on a reduced form approach we consider key elements of military theory as factors in the production of combat success, formalized in a military...

We develop a theory of interstate conflict in which the degree of genealogical relatedness between populations has a positive effect on their conflict propensities because more closely related populations, on average, tend to interact more and develop more disputes over sets of common issues. We...

Draft lottery number assignment during the Vietnam era provides a natural experiment to examine the effects of military service on crime. Using exact dates of birth for inmates in state and federal prisons in 1979, 1986, and 1991, we find robust evidence of effects on violent crimes among...

This paper reviews the economics approach to conflict and national borders. The paper (a) provides a summary of ideas and concepts from the economics literature on the size of nations; (b) illustrates them within a simple analytical framework where populations fight over borders and resources,...