Still following the database of 100.000 scientists,
link above, used by Stanford Professor John Ioannidis that has put Michael Gratzel as top cited
scientist in the world see below
the paper on country self-citations
"...We have studied the database of Ioannidis et
al. published on 12 August 2019 of the one hundred thousand most "highly
cited" scientists, including about two thousand Italians, and we found
that the problem of self-citations in relation to this scientific elite is not
significant in Italy, while perhaps observing a small deviation in the low
scores in the rankings. The effect indicated by Baccini et al. consequently,
does not seem worrying for the scientific elite (we quantified it in 2 percent
of the total of scientists of the "best" one hundred thousand), and
is probably largely concentrated in the further less cited scientists.
Evaluation agencies like ANVUR should probably exclude self-citations in future
evaluations, for the noise introduced by the young researchers. The overall
state of health of the Italian research system and the positive effect of the
ANVUR assessments are demonstrated by the number of Italian researchers in the
top one hundred thousand, which has increased by comparing the
"career" databased of 22 years, with that of the "young"
researchers in the "2017" database. Italy, looking at the elite
researchers, not only is not the most indulgent in self-citations, but has
shown the best improvements, proving that the introduction of ANVUR had a
positive effect. Indeed, all countries apart from Italy have suffered a
decline, even substantial (-20 percent on a national Japan scale), of the
number of researchers present in the 2017 data sets compared to career data.
Italy instead shows a +0.2 percent on a global basis and an impressive +11.53
percent on a national basis"
