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NET EARNINGS PER SHARE
3 Months Ended
Mar. 31, 2012
NET EARNINGS PER SHARE
NET EARNINGS PER SHARE
Our basic and diluted earnings per share attributable to Weyerhaeuser shareholders were:
$0.08 for the quarter ended March 31, 2012; and
$0.18 for the quarter ended March 31, 2011.
Basic earnings per share is net earnings divided by the weighted average number of our outstanding common shares, including stock equivalent units where there is no circumstance under which those shares would not be issued.
Diluted earnings per share is net earnings divided by the sum of the:
weighted average number of our outstanding common shares and
the effect of our outstanding dilutive potential common shares.
Dilutive potential common shares can include:
outstanding stock options,
restricted stock units and
performance share units.
We use the treasury stock method to calculate the effect of our outstanding dilutive potential common shares. Share-based payment awards that are contingently issuable upon the achievement of specified performance or market conditions are included in our diluted earnings per share calculation in the period in which the conditions are satisfied.

SHARES EXCLUDED FROM DILUTIVE EFFECT
The following shares were not included in the computation of diluted earnings per share because they were either antidilutive or the required performance or market conditions were not met. Some or all of these shares may be dilutive potential common shares in future periods.

Potential Shares Not Included in the Computation of Diluted Earnings per Share
 
QUARTER ENDED
SHARES IN THOUSANDS    
MARCH 31,
2012
 
MARCH 31,
2011
Stock options
20,521

 
23,844

Performance share units
548

 
489