A study of shooting victims in Philadelphia has found that people who carry guns are far more likely to be shot than those who are unarmed. Researchers at the University of Pennsylvania looked at 677 shootings over two and a half years, taking into account various factors such as the age and socioeconomic status of those involved. The researchers concluded that armed citizens were 4.5 times more likely to get shot and 4.2 times more likely to get killed than those who were unarmed. Therefore, it is significantly safer not to carry a gun in Philadelphia.