crossposting from drugmonkey.wordpress.com.
He has a new post up in response to a request for the full regression analysis. This analysis is tasty and here was the bit that drew my attention:
A principal component analysis reveals that a single principal component accounts for 71% of the variance in the overall impact scores. This principal component includes substantial contributions from all five criterion scores, with weights of 0.57 for approach, 0.48 for innovation, 0.44 for significance, 0.36 for investigator and 0.35 for environment.