Before revision:  Studying more than 13.6M authors and 20.5M articles from 40 countries we document that: In 2019, almost one in three articles was (co-)authored by authors with multiple affiliations and the share of authors with multiple affiliations increased from 6.7\% to 11.8 \% since 1996.
After revision:  Studying more than 15 million authors and 22 million articles from 40 countries we document that: In 2019, almost one in three articles was (co-)authored by authors with multiple affiliations and the share of authors with multiple affiliations increased from 6.7\% to 11.8 \% since 1996.