Contrary to right-wing rhetoric and popular belief (examples here and here), there isn’t much of a correlation between Latino immigration in the U.S. and crime rates. There’s an interesting new article about this here confirming my previous claims (to make it even more interesting: it’s from a conservative magazine).
Nearly all of the most heavily Latino cities have low or even extremely low crime rates, and virtually none have rates much above the national average. Eighty percent Latino El Paso has the lowest homicide and robbery rates of any major city in the continental United States. This is not what we would expect to find if Hispanics had crime rates far higher than whites. Individual cities may certainly have anomalously low crime rates for a variety of reasons, but the overall trend of crime rates compared to ethnicity seems unmistakable.
Maybe we should assume that the numbers are bit too rosy because of the tendency of illegal immigrants to underreport crime (although the article tries to correct for underreporting by comparing homicides – almost no underreporting – to overall crime). Also, the likelihood of underreporting by illegal immigrants can be offset by a possibly equal effect of criminal restraint on the part of illegal immigrants: for the same reasons that they underreport crime – fear of contacting the authorities and being identified as illegal immigrants – they stay out of trouble with the police and try to act decently.
However, if we look at it from another side, we see that incarceration data show somewhat higher levels for Hispanics or immigrants (although most Hispanics are American-born, the vast majority still comes from a relatively recent immigrant background):
the age-adjusted Hispanic incarceration rate is somewhat above the white rate—perhaps 15 percent higher on average. (source)
Still, one can’t simply conclude from this that crime is more rampant among Hispanics or immigrants. It’s still possible that instead of higher criminality we simply witness the result of harsher treatment of those sections of the population by the judicial system. Also, incarceration rates are inflated because many immigrants are in jail not because of ordinary crimes, but because of infractions of immigration law; you should exclude the latter if you want to compare Hispanic and white criminality (unless you consider infractions of immigration law as essentially equivalent to ordinary crime, which is not altogether insane; but the point of this post is to examine the claim that there are more ordinary criminals among Hispanic immigrants than among [longtime] citizens).
In addition, you should correct incarceration rates for age and gender: in general, most criminals are young men, and it happens to be the case that most immigrants are also young men. So the likelihood that immigrants end up in prison is – slightly – higher compared to the general population, not because they’re Hispanics but because they are young men. Any other, non-immigration related influx of young men in a certain area – e.g. military demobilization or a huge construction project – would have an effect on crime. (If you don’t correct for this, you’re making a common statistical mistake: see here for other examples of the “omitted variable bias”).
Finally, immigrants are relatively poor and there is a link between poverty and crime. So that can also explain the higher incarceration rate for immigrants. If you link the higher probability of poor people engaging in crime with the fact that poor people have lower quality legal representation, you have a double explanation. So, again, if Hispanics do end up in jail more often, perhaps it’s because they’re relatively poor, not because they are Hispanics and somehow racially prone to crime.
All this is limited to the U.S. People can still make the case that immigration in other countries promotes crime, but that case is made harder by the false claims about the U.S. (At least in France there’s no proof of the share of immigrants in the population having a significant impact on crime rates). These false claims are always based on anecdotes, and you’ll always be able to find criminals with foreign sounding names in order to whip up a frenzy against immigration, thereby satisfying your racist hunger and building a political following of ill-informed voters. Again a clear demonstration of the usefulness of statistical analysis in human rights issues and the danger of anecdotal reasoning.
Bonus paper here. Quote:
We examine whether the improvement in immigrants’ relative incarceration rates over the last three decades is linked to increased deportation, immigrant self-selection, or deterrence. Our evidence suggests that deportation does not drive the results. Rather, the process of migration selects individuals who either have lower criminal propensities or are more responsive to deterrent effects than the average native. Immigrants who were already in the country reduced their relative institutionalization probability over the decades; and the newly arrived immigrants in the 1980s and 1990s seem to be particularly unlikely to be involved in criminal activity.
More on migration.