Social Science Research Network
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2607678
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2599897
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2477462
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2159672
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1868979
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3116783
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3703055