"The authors found that by age 18, 30 percent of black men, 26 percent of Hispanic men and 22 percent of white men have been arrested. By 23, those numbers climb to 49 percent for black men, 44 percent for Hispanic men and 38 percent for white men."
To get from 22% arrested to 38% arrested in 5 years would require 3.2% of young white men to be arrested each year. IMO, they either questioned a non-random sample of 7000 males, or moved a decimal point!
According to the FBI, http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2012/crime-in-the-u.s.-2012/persons-arrested/persons-arrested:
Definition The FBI’s Uniform Crime Reporting (UCR) Program counts one arrest for each separate instance in which a person is arrested, cited, or summoned for an offense. The UCR Program collects arrest data on 28 offenses, as described in Offense Definitions. (Please note that, beginning in 2010, the UCR Program no longer collected data on runaways.) Because a person may be arrested multiple times during a year, the UCR arrest figures do not reflect the number of individuals who have been arrested; rather, the arrest data show the number of times that persons are arrested, as reported by law enforcement agencies to the UCR Program.
The estimated arrest rate for the United States in 2012 was 3,888.2 arrests per 100,000 inhabitants. The arrest rate for violent crime (including murder and nonnegligent manslaughter, forcible rape, robbery, and aggravated assault) was 166.3 per 100,000 inhabitants, and the arrest rate for property crime (burglary, larceny-theft, motor vehicle theft, and arson) was 528.1 per 100,000 inhabitants. (See Table 30.)
I think it's very unlikely that it's a completely different 3.9% that's getting arrested every single year -- so IMO, this study must be bogus!