\subsection*{A measure of research impact independent of historical effects}
Here we propose a novel, simple, and effective measure of research
performance, designed to minimize the disciplinary and historical
effects which most negatively affect citation counts and derivative
measures.  In addition to the volume of citations,
the proposed measure employs two more bits of bibliographic information,
readily available by modern scholarly databases: the
number of authors and the number of references in a paper.
