archived: https://archive.ph/ei2p7 https://archive.ph/ei2p7 The paper is at https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3784969 https://papers.ssrn.com

archived: https://archive.ph/ei2p7 https://archive.ph/ei2p7 The paper is at https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3784969 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3784969 .