I believe this is the paper being referenced - https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2992783 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2

I believe this is the paper being referenced - https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2992783 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2992783