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Trends in U.S. staffing market concentration and staffing firm rankings, 2007-2011

  • Portion of U.S. staffing market captured by top fifteen largest firms steadily increased by average of +2.3 percentage points from 2007-2011
  • Many staffing segment markets experienced a significant increase in concentration during the recession (2008-2009)
  • Allegis Group and Adecco maintained their number one and number two positions on the U.S. largest list all five years

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