Earnings per share

9 Months Ended

Oct. 28, 2011

Earnings per share

Earnings per share

3. Earnings per share

Earnings per share is computed as follows (in thousands, except per share data):

	13 Weeks Ended October 28, 2011					13 Weeks Ended October 29, 2010
	Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount
Basic earnings per share	$	171,164	341,955	$	0.50	$	128,120	341,062	$	0.38
Effect of dilutive share-based awards			3,822					3,677
Diluted earnings per share	$	171,164	345,777	$	0.50	$	128,120	344,739	$	0.37

	39 Weeks Ended October 28, 2011					39 Weeks Ended October 29, 2010
	Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount
Basic earnings per share	$	474,175	341,670	$	1.39	$	405,311	340,961	$	1.19
Effect of dilutive share-based awards			3,928					3,667
Diluted earnings per share	$	474,175	345,598	$	1.37	$	405,311	344,628	$	1.18

Basic earnings per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is determined based on the dilutive effect of stock options using the treasury stock method.

Options to purchase shares of common stock that were outstanding at the end of the respective periods, but were not included in the computation of diluted earnings per share because the effect of exercising such options would be antidilutive, were 0.3 million in each of the periods ended October 28, 2011 and October 29, 2010, respectively.