More than one in 100 adult Americans is in jail or prison, an all-time high that is costing state governments nearly $50 billion a year, in addition to more than $5 billion spent by the federal government, according to a report released today. With more than 2.3 million people behind bars at the start of 2008, the United States leads the world in both the number and the percentage of residents it incarcerates, leaving even far more populous China a distant second, noted the report by the nonpartisan Pew Center on the States. The ballooning prison population is largely the result of tougher state and federal sentencing imposed since the mid-1980s. Minorities have been hit particularly hard: One in nine black men age 20 to 34 is behind bars. For black women age 35 to 39, the figure is one in 100, compared with one in 355 white women in the same age group. While studies generally find that imprisoning more offenders reduces crime, the effect is influenced by changes in the unemployment rate, wages, the ratio of police officers to residents, and the share of young people in the population. In addition, when it comes […]