I am aware that Scrimago and JCR are both authoritative sources. It seems that Scrimajo includes more journals. I was wondering which one of them is more widely used and more important?
1 Answer
JCR is easily the gold standard. It's the one that is used to calculate the impact factor, after all.
A heuristic is, the fewer journals are indexed, the more exclusive the index, and therefore the more prestigious.