Rémi Boivin is Associate Professor at the School of Criminology of the Université de Montréal, Cananda. Prof. Boivin’ focus on crime analysis led him to the study of co-offending and mobility, for which he used social network perspectives and techniques. His doctoral dissertation was co-supervised by Prof. Carlo Morselli.David Décary-Hétu is Associate Professor at the School of Criminology of the Université de Montréal, Canada. Through his innovative approach, Prof. Décary-Hétu studies how offenders adopt and use technologies, and how that shapes the regulation of offenses, as well as how researchers can study offenders and offenses.

• Introduction: the criminology of Carlo Morselli 1. The determinants of group membership in organized crime in the UK: A network study 2. Violence brokers and super-spreaders: how organised crime transformed the structure of Chicago violence during Prohibition 3. Come at the king, you best not miss: criminal network adaptation after law enforcement targeting of key players 4. Cryptomarkets and the returns to criminal experience 5. Criminal achievement, criminal self-efficacy, and the criminology of Carlo Morselli: suggestions for continuing and extending a fruitful line of inquiry 6. Assessing variation in co-offending networks

Rémi Boivin is Associate Professor at the School of Criminology of the Université de Montréal, Cananda. Prof. Boivin’ focus on crime analysis led him to the study of co-offending and mobility, for which he used social network perspectives and techniques. His doctoral dissertation was co-supervised by Prof. Carlo Morselli.David Décary-Hétu is Associate Professor at the School of Criminology of the Université de Montréal, Canada. Through his innovative approach, Prof. Décary-Hétu studies how offenders adopt and use technologies, and how that shapes the regulation of offenses, as well as how researchers can study offenders and offenses.

• Introduction: the criminology of Carlo Morselli 1. The determinants of group membership in organized crime in the UK: A network study 2. Violence brokers and super-spreaders: how organised crime transformed the structure of Chicago violence during Prohibition 3. Come at the king, you best not miss: criminal network adaptation after law enforcement targeting of key players 4. Cryptomarkets and the returns to criminal experience 5. Criminal achievement, criminal self-efficacy, and the criminology of Carlo Morselli: suggestions for continuing and extending a fruitful line of inquiry 6. Assessing variation in co-offending networks

Rémi Boivin is Associate Professor at the School of Criminology of the Université de Montréal, Cananda. Prof. Boivin’ focus on crime analysis led him to the study of co-offending and mobility, for which he used social network perspectives and techniques. His doctoral dissertation was co-supervised by Prof. Carlo Morselli.David Décary-Hétu is Associate Professor at the School of Criminology of the Université de Montréal, Canada. Through his innovative approach, Prof. Décary-Hétu studies how offenders adopt and use technologies, and how that shapes the regulation of offenses, as well as how researchers can study offenders and offenses.

• Introduction: the criminology of Carlo Morselli 1. The determinants of group membership in organized crime in the UK: A network study 2. Violence brokers and super-spreaders: how organised crime transformed the structure of Chicago violence during Prohibition 3. Come at the king, you best not miss: criminal network adaptation after law enforcement targeting of key players 4. Cryptomarkets and the returns to criminal experience 5. Criminal achievement, criminal self-efficacy, and the criminology of Carlo Morselli: suggestions for continuing and extending a fruitful line of inquiry 6. Assessing variation in co-offending networks