Much ado about nothing: Overinterpreting volatility in homicide rates

Andrew Wheeler (a PhD criminologist teaching in Texas, and a former undergraduate student of mine) explains what you may or may not already know about homicide rates in the U.S.

Andrew Wheeler

I’m not much of a macro criminologist, but being asked questions by my dad (about Richard Rosenfeld and the Ferguson effect) and the dentist yesterday (asking about some of Trumps comments about rising crime trends) has prompted me to jump into it and give my opinion. Long story short — many sources I believe are overinterpreting short term fluctuations as more meaningful than they are.

First I will tackle national crime rates. So if you have happened to walk by a TV playing CNN the past few days, you may have heard Donald Trump being criticized for his statements on crime rates. This is partially a conflation with the difference between overall levels of crime versus changes in crime over time. Basically crime is currently low compared to historical patterns, but homicide rates have been rising in the past two years. This is easier to show in a chart…

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