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Letters to the editor August 15 2019

August 15 2019 - 1:00am
AIM UP: Reader Barney Langford argues that correlation is not causation when it comes to relaxation of gun control measures and a reduction in violent crime in the USA.
AIM UP: Reader Barney Langford argues that correlation is not causation when it comes to relaxation of gun control measures and a reduction in violent crime in the USA.

SCOTT Hilliard's letter (Letters, 12/8) argues that it is the increase in the number of states allowing citizens to carry concealed guns "from 13 to over 40" that has led to a decrease in violent crime from 10 per 100,000 in the 1990s, to 4.5 per 100,000 today. Violent crime in the U.S. has been in long-term decline, with an upturn in the 1970s and 1980s followed by a reversion to the long-term trend. A small increase in the early 1990s bucked that overall trend. The decline then resumed for the rest of the 1990s and beyond. It is a logical fallacy to suggest that correlation is causation; just because two events occur simultaneously doesn't mean that there is a causal link. More states permitting the carrying of concealed guns occurring at the same time as the decrease doesn't mean that this was the cause of the reduction in violent crime.

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