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EARNINGS PER SHARE
 12 Months Ended
Dec. 31, 2012
EARNINGS PER SHARE  
EARNINGS PER SHARE

16. EARNINGS PER SHARE

        The following table sets forth the computation of basic and diluted gain (loss) per share for the periods indicated:

 
   Years Ended December 31,  
 
   2010   2011   2012  
 
   $
   $
   $
  

Net income (loss) attributable to Canadian Solar Inc.—basic and diluted

   $ 50, 568,919   $ (90,804,200 ) $ (195,468,691 )
               

Weighted average number of common shares—basic

     42,839,356     43,076,489     43,190,778  

Diluted share number from share options and restricted shares

     838,852     —     —  
               

Weighted average number of common shares—diluted

     43,678,208     43,076,489     43,190,778  
               

Basic earnings (loss) per share

   $ 1.18   $ (2.11 ) $ (4.53 )
               

Diluted earnings (loss) per share

   $ 1.16   $ (2.11 ) $ (4.53 )
               

        The following table sets forth anti-dilutive shares excluded from the computation of diluted earnings (loss) per share for the periods indicated.

 
   Years Ended December 31,  
 
   2010   2011   2012  

Convertible notes

     50,607     50,607     —  

Share options, restricted shares and restricted share units

     426,716     1,871,147     4,288,008  

Warrant

     —     —     4,273,102  
               

 

     477,323     1,921,754     8,561,110