This paper proposes a new identification strategy to estimate the causal impact of illicit drug markets on violence using a panel of Colombian municipalities covering the period 1994-2008. Using a UNODC survey of Colombian rural households involved in coca cultivation, we estimate the...

We model the war on drugs in source countries as a conflict over scarce inputs of successive levels of the production and trafficking chain. We explicitly model the vertical structure of the drug trade as being composed of several stages, and study how different policies aimed at different...

I study the causal effect of violence against social leaders on coca cultivation and land restitution requests in the Colombian context from 2012 to 2018. Using the timing of unexpected killings of social leaders in an event study approach, I provide evidence that the start of the violence...

This paper develops a model of the war against illegal drugs in both producer and consumer countries. The paper studies the trade-off faced by the government of the drug consumer country between prevention policies (aimed at reducing the demand for drugs) and enforcement policies (aimed at...

How should a state which lacks the monopoly of violence go about acquiring it? We investigate the use of high-powered incentives for members of the Colombian army as part of a strategy to combat left-wing guerillas and build the state's monopoly of violence. We show that this top-down...

This paper measures the impact of crime on firm investment by exploiting variation in kidnappings in Colombia from 1996 to 2002. Our central result is that firms invest less when kidnappings target firms. We also find that aggregate crime rates-homicides, guerrilla attacks, and general...

This paper develops a simple model of the war against illegal drugs in producer and consumer countries. Our analysis shows how the equilibrium quantity of illegal drugs, as well as their price, depends on key parameters of the model, among them the price elasticity of demand, and the...

This paper provides a thorough economic evaluation of the anti-drug policies implemented in Colombia between 2000 and 2006 under the so-called Plan Colombia. The paper develops a game theory model of the war against illegal drugs in producer countries. We explicitly model illegal drug markets,...

I apply the Beveridge-Nelson business cycle decomposition method to the time series of murder in the United States (1900-2004). Separating out “permanent” from “cyclical” murder, I hypothesize that the cyclical part coincides with documented waves of organized crime, internal tensions,...

We estimate a model to account for homicide cycles in Colombia, 1950-1999. The variables that together account for about eighty percent of the variation in murder cycles are the years of Colombia(s La Violencia period, the years of collusion between the two establishment parties (the National...