We investigate whether the stock of foreigners residing in a country leads to a larger number of terrorist attacks on that country. Our instrument for the stock of foreigners relies on the interaction of two sets of variables. Variation across host-origin-dyads results from structural...

This paper studies how an increase in the number of armed groups operating within an area affects the amount of organized political violence. We use plausible exogenous variation in the number of armed groups in Pakistan, by exploiting the split of a major group due to the natural death of its...

We analyze how a country's immigrant population—defined as the stock of people born abroad—affects the probability of a terrorist attack in the host country. Using data for 20 OECD host countries and 183 countries of origin over the 1980–2010 period our OLS and 2SLS regressions show that...

We analyze the causal effect of the stock of foreigners residing in a country on the probability of a terrorist attack in that country. Our instrument for the stock of foreigners relies on the interactions of two sets of variables. Variation across host-origin-dyads results from structural...

This paper studies how an increase in the number of armed groups operating within an area affects the amount of organized political violence. We use plausible exogenous variation in the number of armed groups in Pakistan, by exploiting the split of a major group due to the natural death of its...

This paper studies how an increase in the number of armed groups operating within an area affects the amount of organized political violence. We use plausible exogenous variation in the number of armed groups in Pakistan, by exploiting the split of a major group due to the natural death of its...

We investigate whether the stock of foreigners residing in a country leads to a larger number of terrorist attacks on that country. Our instrument for the stock of foreigners relies on the interaction of two sets of variables. Variation across host-origin-dyads results from structural...