www.thinkprogress.org/health/2014/02/04/3249671/obamacare-job-lock/
"Academic research has quantified the cost of keeping health care coverage connected to the workplace. In 2008, researchers at Harvard estimated that there are “11 million people who would like to change jobs but are locked into their current job simply to keep their insurance,” while other studies have found that “job-to-job mobility is estimated to increase by as much as 25 percent when alternative group coverage is available.”
As Sen. John McCain (R-AZ) explained in 2008, while rolling out the health care proposal that animated his presidential campaign, “‘job lock’ reduces opportunities for American workers because they often pass up new jobs for fear of losing their health care coverage.” The health care law will start to change that predicament."