Effective 1 July, Penn PSC Research Associates Dirk Krueger and John MacDonald step down from, respectively, Economics and Criminology, where they have completed outstanding tenures as departmental chairs.  John, who is Professor of Criminology and Sociology, will continue in his role as Penny and Robert A. Fox Faculty Director of the Fels Institute.  He is replaced as Chair of Criminology by PSC Research Associate Richard Berk, Professor of Criminology and Professor of Statistics.