paper_author
SQL table: MASTER.PAPER_AUTHOR
Bridge table linking a paper to one of its authors, with authorship metrics that connect the paper and the author: the author’s position in the byline, the paper’s total author count, the author’s fractional contribution, and domestic/international co-author counts. It also records the author’s institution and nation for this paper as FK dimensions. Grain: one row per (paper_id, author_id) pair.

