To test a model of contagion--where individuals hear some bad news and communicate it to their acquaintances, who then pass it on, leading to a market panic--requires a knowledge of the information networks of participants, something hitherto unavailable. For two panics in the 1850s this paper...

This paper examines how estimates of the deterrent effect of capital punishment depend on alternate choices of assumptions concerning the homicide process. Specific models of the homicide process represent bundles of these assumptions, which involve the unobserved heterogeneity, the relevant...