We adapt the heterogeneous firm trade models of Helpman, Melitz, and Rubinstein (2008) and Lawless (2010) to analyze extensive and intensive trade margins using state-level exports to foreign nations. Our theoretical analysis provides definitive predictions for the effects of changes in fixed...

Since the end of the Cold War, the world remains a dangerous place with new threats: regional conflicts, transnational terrorist networks, rogue states, and weapons of mass destruction (i.e., chemical, biological, radiological, and nuclear). The second volume of the Handbook of Defense Economics...