Center for Law and Social Policy.  (2006, July).  Presenteeism and Paid Sick Days.  Washington, DC: Author. 

"Employers who do not provide paid sick days may feel it is too expensive to pay for workers who do not come to work. However, new research suggests that when workers are sick on the job, their presence comes at a cost to employers•the "hidden" cost of reduced productivity. This four-page paper defines "presenteeism" and discusses what can and is being done about it.”

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For more information on the Center for Law and Social Policy, click here: http://www.clasp.org/