Earnings per share for the three months ended March 31, 2013 and 2012 are calculated as follows (in thousands, except per share amounts): | | | | | | | | | | Three Months Ended | | March 31, | | 2013 | | 2012 | Basic earnings per share: | | | | Net income attributable to Republic Services, Inc. | $ | 124,600 |
| | $ | 142,900 |
| Weighted average common shares outstanding | 362,662 |
| | 370,997 |
| Basic earnings per share | $ | 0.34 |
| | $ | 0.39 |
| Diluted earnings per share: | | | | Net income attributable to Republic Services, Inc. | $ | 124,600 |
| | $ | 142,900 |
| Weighted average common shares outstanding | 362,662 |
| | 370,997 |
| Effect of dilutive securities: | | | | Options to purchase common stock | 1,373 |
| | 1,415 |
| Unvested restricted stock awards | 57 |
| | 78 |
| Weighted average common and common equivalent shares outstanding | 364,092 |
| | 372,490 |
| Diluted earnings per share | $ | 0.34 |
| | $ | 0.38 |
| Antidilutive securities not included in the diluted earnings per share calculations: | | | | Options to purchase common stock | 2,473 |
| | 5,673 |
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