Liberal drug policy reform is often criticized for ‘sending the wrong message’, particularly to youth. Reform opponents argue that liberal policies such as decriminalisation and medical marijuana laws will cause marijuana to be perceived as less risky and lead to an increase in use....

Provided that the literature on th e deterrent effect of capital punishment is overall inconclu- sive, the fact that individual au thors persistently claim to have found solid evidence in one or the other direction raises two questions. Firstly, what are the causes for these different results?...

In 2007, the Wall Street Journal published an article claiming that each execution saves more than 70 lives. This example is used to show how easy it is, using simple or advanced econometric techniques, to produce results that do or do not support the deterrence hypothesis. Moreover, we also...

In the course of history a large number of politicians has been assassinated. A rational choice analysis is used to distinguish the expected marginal benefits of killing, and the marginal cost of attacking a politician. The comparative analysis of various equilibria helps us to gain insights...

In the course of history, a large number of politicians have been assassinated. Rational choice hypotheses are developed and tested using panel data covering more than 100 countries over a period of 20 years. Several strategies, in addition to security measures, are shown to significantly reduce...