https://blogs.lse.ac.uk/politicsandpolicy/world-bank-business-rankings/
Authors. Herrera, H. & Stipanicic, A. (LSE British Politics and Policy)
How the Institute flags it
established 3 times frontier 2 times
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.