In repeated normal-form (simultaneous-move) games, simple penal codes (Abreu,1986, 1988) permit an elegant characterization of the set of subgame-perfect outcomes. We show that the logic of simple penal codes fails in repeated extensive-form games. By means of examples, we identify two types of...

The Dark Web has changed the way drugs are traded globally by shifting trade away from the streets and onto the web. In this paper, I study whether the Dark Web has an impact on street crime, a common side effect of traditional drug trade. To identify a causal effect, I use daily data from the...

In the 2015 refugee crisis, nearly one million refugees came to Germany, raising concern that crimes against natives would rise. Using novel county-level data, we study this question empirically in first-difference and 2SLS regressions. Our results do not support the view that Germans were...

Mozambique is a significant heroin transit centre and the trade has increased to 40 tonnes or more per year, making it a major export which contributes up to $100 mn per year to the local economy. For 25 years the trade has been controlled by a few local trading families and tightly regulated by...

This paper puts into perspective enforcement as conducted by the French Financial Market Authority since its creation in 2003 until 2021 with regards to the current state of the literature on financial crimes. We survey exhaustively the three main channels of action: sanctions, settlements...