“…35 , 36 The majority of studies were based in urban locations, with heavy bias towards high-income countries, including the United States (n = 14), 17 , 18 , 19 , 22 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 37 , 38 , 39 Australia (n = 2), 23 , 34 and Western Europe (n = 18). 20 , 21 , 24 , 26 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 Records were examined visually via placement of study results onto a world map. All eight studies showing an increase in violence were based in the United States.…”