Very interesting article worth reading over:
http://www.seomoz.org/blog/google-vs...nking-elements
Goals of the Correlation Data Research
With this research, we hope to accomplish three big things:Further research, including causation analysis through more sophisticated ranking models and possibly more correlation analysis on other factors are certainly part of our goals as well.
- Add a new source of data to SEOs' understanding of how Google & Bing rank web pages
- Bring more science to SEO through a repeatable, peer-reviewed dataset
- Provide recommendations based on our own interpretations AND open the data for interpretation by others as well