What this is about: SBE 2020.
244 white papers in SBE available on the NSF site.
The white papers in Economics. Note that some of these papers are not available on the NSF site as they were submitted after their deadline, hence this is not really a subset of the earlier 244; moreover, more might be added at this link (I would not be surprised to count ultimately more here than the total number of papers on the NSF site, after all Econ work is never over-- last bullet point).
(hat tip to Al Roth)