Social network analysis can help us understand more about the root causes of delinquent behavior and crime and provide practical guidance for the design of crime prevention policies. To illustrate these points, we first present a selective review of several key studies and findings from the...

Hayeks frühes Plädoyer zugunsten dezentraler Planung beruht auf seinem innovativen Argument überlegener Wissensverarbeitung, das dem Wettbewerb wichtige gesell-schaftspolitische Funktionen zuschreibt. In seinen späteren Schriften hat er herausgear-beitet, wie wichtig der Wettbewerb ist, um...

Destination countries can adopt selective immigration policies to improve migrants' quality. Screening potential migrants on the basis of observable characteristics also influences their self-selection on unobservables. We propose a model that analyzes the effects of selective immigration...