In my last post I showed that an archaeology journals’ Scientific Journal Ranking (SJR) score does not correlate with the price charged to read them. Using the SJR database, again, I show that there is no correlation between price and the SJR impact factor.
The main SJR score uses a page rank algorithm to calculate the score but it also provides the two year average citation per article metric. This is the same calculation as the Thomson Reuters Journal Impact Score. The difference is that SJR uses the Scorpus database which has a much better coverage (40 archaeology journals in this dataset and 85 total) then the 12 journals covered by the TRJIS. So there should be some difference in the SJR JIS-like figure and the TRJIS.
I compared this SJR Journal Impact Score against journal prices:
As with every other metric tested there does not seem to be a correlation between price and journal quality (R2< .5 indicates not correlation).