I don't know if I agree that city crime is declining because of a more even distribution of the population likely to commit crime. First, criminals don't necessarily commit within jurisdictions they live in, and I haven't seen any studies indicating connections either way (that is, whether they are likely to commit in or out of jurisdiction).
But, even if it were true that population movement is responsible, there'd have been a much greater population shift in the last ten years than there has been (or in the last three years) to account for the significant decline in crime in the city.
After all, did 26% of the people likely to commit violent crime leave the city in the last 12 months? From Jan. to May 2012, 2,600 violent crimes were committed in the city, while from Jan. to May 2013, only 2,100. Did 300 to 500 violent criminals move to the county or die?
Another way to put it: from 2011 to 2012, the city went from 320,500 residents to 318,500, a loss of 2,000 people. Index crime declined from 31,500 incidents to 27,500 incidents, a drop of 4,000 incidents. If the argument is that crime statistics are showing declines because of a movement of criminal populations, then all of the net 2,000 people who either died or moved out were responsible for two crimes apiece, including those who are moving to the suburbs for better schools, infrastructure, etc.
But, even if it were true that population movement is responsible, there'd have been a much greater population shift in the last ten years than there has been (or in the last three years) to account for the significant decline in crime in the city.
After all, did 26% of the people likely to commit violent crime leave the city in the last 12 months? From Jan. to May 2012, 2,600 violent crimes were committed in the city, while from Jan. to May 2013, only 2,100. Did 300 to 500 violent criminals move to the county or die?
Another way to put it: from 2011 to 2012, the city went from 320,500 residents to 318,500, a loss of 2,000 people. Index crime declined from 31,500 incidents to 27,500 incidents, a drop of 4,000 incidents. If the argument is that crime statistics are showing declines because of a movement of criminal populations, then all of the net 2,000 people who either died or moved out were responsible for two crimes apiece, including those who are moving to the suburbs for better schools, infrastructure, etc.







