This article investigates and compares the root causes of transnational terrorism and piracy. In order to accomplish this, we construct a novel data set that catalogues terrorist activity and piracy over the years 1992–2008, paying particular attention to the Arabian Sea and Indian Ocean since...

We explore the link between stock returns and changes in market capital concentration across firms. Our theory uncovers a concentration risk factor driven by time-varying changes in the distribution of market capital. A powerful implication of our theory is the necessary existence of this...

We consider a setup in which infinitely lived households face idiosyncratic investment risk and show that in this case the equilibrium distribution of wealth becomes increasingly right-skewed over time until wealth concentrates entirely at the top. The households in our setup are identical in...