Me helping to explain the Barnum effect on Netflix
Have you ever picked up the paper, read your horoscope, and thought, “Huh, that kind of sounds right”?
There’s a reason why.
— Vox (@voxdotcom) August 9, 2018
Firearm Mortality in Red and Blue States
Yesterday (November 5, 2017) there was another mass shooting in America, so today I constructed the enclosed chart. The mortality data come from this page of the CDC website and are for the most recent year available, 2015. The figures are per 100,000 of total population. The difference is statistically significant, t(48) = 4.95, p < .001.
Firearm mortality rates vary substantially across states. Alaska has the highest rate at 23.4 per 100,000. Massachusetts has the lowest at 3.0. As a result, firearm deaths are 7.8 times more likely in Alaska than in Massachusetts.
—November 6, 2017
The Obamacare Effect
That sharp dip starting in 2010 was produced by the Affordable Care Act, as many more people secured healthcare coverage. What will this chart will look like in the future?
Buy A House?
Murder Weapon Trends
The most striking—though not surprising—thing about this graph is the much higher rate of homicides that involve a firearm, and also the dramatic variation in gun homicides since the mid-1970s. Guns are quite lethal, of course, but they also appear to be sensitive to other factors. For example, during the crack epidemic years of 1984-1989, homicides more than doubled among young black men, which may be a partial explanation for the spike during those years shown here.
The only other weapon that shows any degree of variation is the decline in the popularity of cutting/stabbing. Today this weapon is responsible for fewer than half the number of homicides as in 1980.
(Posted March 14, 2016. Additional text added on March 27, 2016.)