• The U.S. health care system imposes a heavy "tax" on small businesses and their employees. Due to high broker fees, fixed administrative costs, and adverse selection, small businesses pay up to 18 percent more per worker than large firms for the same health insurance policy. Some of these higher costs are passed on to small firm employees in the form of lower wages, and some eat into the profits of small businesses that could otherwise be used for research and development and for much-needed investments. This implicit tax disadvantages small firms in both the market for the best workers and the market for their products.
• Because of their higher health care costs, small businesses are far less likely to provide health insurance for their workers than larger businesses. Only 49 percent of firms with 3 to 9 workers and 78 percent of firms with 10 to 24 workers offered any type of health insurance to their employees in 2008. In contrast, 99 percent of firms with more than 200 workers offered health insurance. Consistent with this pattern, 29 percent of non-elderly adult workers at firms with fewer than 25 employees were uninsured in 2007. In that same year, just 10 percent of workers in firms with 500 or more employees were uninsured. Workers at small firms that do offer health insurance also tend to have less generous plans than workers at large firms.
• The fraction of small firms offering health insurance has been declining in recent years. From 2002 to 2008, the fraction of firms with 3 to 9 employees offering health insurance to their workers declined from 58 to 49 percent.

References:
1. Roy, Avik (February 7, 2012). "The Tortuous History of Conservatives and the Individual Mandate". Forbes Magazine.
2. Cohn, Jonathan (April 9, 2010). "Common Sense". The New Republic.
3. Cooper, Michael (February 14, 2012). "Conservatives Sowed Idea of Health Care