| Solving the Omitted Variables Problem of Regression Analysis Using the Relative Vertical Position of Observations. | 0 | 0.34 | 2012 |
| Capturing climate's effect on pollution abatement with an improved solution to the omitted variables problem | 3 | 0.52 | 2008 |
| Tackling the omitted variables problem without the strong assumptions of proxies | 2 | 0.88 | 2007 |
