This paper examines the dynamics of violence in the Palestinian-Israeli conflict during the Second Intifada. Using data on the daily number of fatalities between September 2000 and January 2005, we estimate reaction functions for both Israelis and Palestinians and find evidence of Granger...

We define national security (NS) as public policies that protect the safety or welfare of a nation's citizens from substantial threats. NS capital provides societal insurance against widespread harm or catastrophe, so optimal NS investments may have very low expected rates of return. Investment...

We use rich historical data on military procurement to estimate the effects of government spending. We exploit regional variation in military build-ups to estimate an "open economy relative multiplier" of approximately 1.5. We develop a framework for interpreting this estimate and relating it to...

If workers self-select into industries based upon their relative productivity in different tasks, and comparative advantage is aligned with absolute advantage, then the average efficacy of a sector's workforce will be negatively correlated with its employment share. This might explain the...