Experience Modification Factor Calculated
The experience period is the time frame from which the Experience Modification Factor (Ex-Mod, or X-Mod, or E-Mod) is calculated.
The usual period is from the policies four years ago to two years ago. For instance if you have a policy that starts on 1/1/2010, your experience period would likely be 2006, 2007, and 2008. 2009 would not be included. The 2009 claims have not had enough development to use as an accurate basis.
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