What do street lights, tree cover, and public art all have to do with criminology? According to the data, these small initiatives can move the needle on the prevalence of neighborhood crime. In the fourth special edition of the Ampersand Podcast, Mark Trodden, Dean of Penn Arts & Sciences and Thomas S. Gates, Jr. Professor of Physics & Astronomy, talks with John MacDonald, Professor of Criminology and Sociology, and Director of the Master of Science in Criminology, about crime prevention through design, big data and technology, and how the Cambridge inspired a new program at Penn.