What are the conditions conducive to long-term transplantation of mafia groups in new territories? This paper systematically reviews a number of factors that facilitate such an outcome, including: migration from territories with high mafia density; the policy of forcing criminals to resettle...

The rescue of persecuted minorities - such as the Jews in Nazi occupied Europe - is seen in this paper as taking place in a peculiar market. In such a market rescuers face at least two dilemmas. Firstly, they might be willing to help but be uncertain how to go about rescuing. Secondly, they...