I just came across this report from the Immigration Policy Center in 2008.
Numerous studies by independent researchers and government commissions over the past 100 years repeatedly and consistently have found that immigrants are less likely to commit crimes or be behind bars than the nativeborn. In the early decades of the 20th century, during the previous era of large-scale immigration, various federal commissions found lower levels of crime among the foreign-born than the native-born. More recently, the U.S. Commission on Immigration Reform reached a similar conclusion in a 1994 report, as have academic researchers using data from the 1980, 1990, and 2000 Census; the National Longitudinal Study of Adolescent Health; and the results of community studies in Chicago, San Diego, El Paso, and Miami.
The problem of crime in the United States is not “caused” or even aggravated by immigrants, regardless of their legal status. This is hardly surprising since immigrants come to the United States to pursue economic and educational opportunities not available in their home countries and to build better lives for themselves and their families. As a result, they have little to gain and much to lose by breaking the law. Undocumented immigrants in particular have even more reason to not run afoul of the law given the risk of deportation that their lack of legal status entails.
And:
In 2000, among men age 18-39 (who comprise the vast majority of the U.S. prison population), the incarceration rate for the native-born (3.5%) was five times higher than the rate for immigrants (0.7%).
And
In stereotyping immigrants as criminals, some anti-immigrant activists have pointed to estimates by the U.S. Government Accountability Office (GAO) that one quarter of all federal prisoners in the United States are “criminal aliens.”
However, these estimates are highly misleading for two reasons:
Only about 8% of the 2.2 million persons behind bars in the United States at the end of 2005 were in federal prisons. The majority of inmates are in state prisons (57%) or local jails (34%).
Undocumented immigrants are likely to be transferred into the much smaller federal prison system simply on the basis of their immigration status even if they have not committed a criminal offense, or have committed an offense that is relatively minor.
I still think that completely open borders probably would cause a spike in crime. Immigration => poverty => crime is the chain of causation in my mind. That’s one of the only arguments against open borders that’s at all creditable, even if there’s no real evidence for it; crude theories are sometimes right, and sometimes the best guides we have to guess the effects of policies that step well outside the range of experience. I still support open borders, of course, but I think crime risks are a good reason to open the borders carefully and in a somewhat gradual manner. But we should always bear in mind that nothing remotely like an immigration-induced crime wave has actually happened. On the contrary, immigrants are more law-abiding than natives. The easiest way to keep crime down is probably to let in a few more of these law-abiding foreigners to restrain unruly natives.
UPDATE: I had planned to make this a simple “utility” post with a link to an interesting study, but I’m afraid I added more verbiage than I planned, and may have caused confusion. The last statement “let in a few more of these law-abiding foreigners to restrain unruly natives” may have come across as flippant. It actually conflates an obvious point with a more subtle, speculative point. The obvious point is that if immigrants have lower crime rates than natives, they’ll bring down average crime rates even if they don’t affect crime rates among natives. In that case, though, one couldn’t say except as a joke that they were “restraining unruly natives.” Continue reading Is Immigration the Best Way to Fight Crime? →