Institution: | a Faculty of Actuarial Science and Insurance, Cass Business School, 106 Bunhill Row, London EC1Y 8TZ, UK;b Department of Statistics, University of Oxford, 1 South Parks Road, Oxford OX1 3TG, UK;c Dipartimento di Economia, Università Roma Tre, Via Silvio D’Amico, 77, 00145 Roma, Italy |