This is one benefit of being wealthy in the city: more urban neighborhoods are hiring private police.

Long known for patrolling shopping malls and gated communities, private security firms are beginning to spread into city streets. While private security has long been contracted by homeowners associations and commercial districts, the trend of groups of neighbors pooling money to contract private security for their streets is something new.

Besides Oakland, neighborhoods in Atlanta and Detroit – both cities with high rates of crime – have hired firms to patrol their neighborhoods, says Steve Amitay, executive director of the National Association of Security Contractors.

“It’s happening everywhere,” Mr. Amitay says. “Municipal governments and cities are really getting strapped in terms of their resources, and when a police department cuts 100 officers obviously they are going to respond to less crimes.”…

Meanwhile, the private security industry is projected to grow by about 19 percent – from 1 million to 1.2 million guards – between 2010 and 2020, according to the Bureau of Labor Statistics. Most of that growth will come because private firms are doing jobs once held by law enforcement, according to the bureau.

Another side effect of the economic crisis. Of course, this reinforces some of the differential opportunities and resources available to different neighborhoods and communities. Similar to other areas like education or health care, the wealthy can simply purchase the services they need to live int he way they would like.