@CCochard @AVerger I also think that any paper that cites a highly cited method, like the Bradford assay--cited over 240,000 times!--will have a lower CD index. Only a few of those 240,000 papers (or whatever fraction occurred in the last 5 years) are also likely to cite the paper of interest.
@askennard @CCochard yep and because many journals have now explicit limits on the number of references that can be included in one article, I guess it completely changes the analysis of the cited papers over time.