RT Article T1 Underground Gun Markets A1 Cook, Philip J. 1946- A2 Braga, Anthony Allan 1969- A2 Venkatesh, Sudhir A. A2 Ludwig, Jens LA English PB National Bureau of Economic Research YR 2005 UL https://krimdok.uni-tuebingen.de/Record/1912732289 DO 10.3386/w11737