https://www.nber.org/papers/w26900
Authors. Aridor, G., Che, Y.-K. & Salz, T
Venue. NBER Working Paper 26900
How the Institute flags it
established 1 time frontier 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.