  Researchers affiliated with multiple institutions are increasingly seen in
current scientific environment. In this paper we systematically analyze the
multi-affiliated authorship and its effect on citation impact, with focus on
the scientific output of research collaboration. By considering the nationality
of each institutions, we further differentiate the national multi-affiliated
authorship and international multi-affiliated authorship and reveal their
different patterns across disciplines and countries. We observe a large share
of publications with multi-affiliated authorship (45.6%) in research
collaboration, with a larger share of publications containing national
multi-affiliated authorship in medicine related and biology related
disciplines, and a larger share of publications containing international type
in Space Science, Physics and Geosciences. To a country-based view, we
distinguish between domestic and foreign multi-affiliated authorship to a
specific country. Taking G7 and BRICS countries as samples from different S&T
level, we find that the domestic national multi-affiliated authorship relate to
more on citation impact for most disciplines of G7 countries, while domestic
international multi-affiliated authorships are more positively influential for
most BRICS countries.
