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Azmat, Ghazala and Iriberri, Nagore (2009) The importance of relative performance feedback information: evidence from a natural experiment using high school students. CEP Discussion Paper, No. 915. Centre for Economic Performance, London School of Economics and Political Science, London, UK. ISBN 9780853283485
Robinson, Peter M. (2002) Denis Sargan: some perspectives. Econometrics; EM/2002/437, EM/02/437. Suntory and Toyota International Centres for Economics and Related Disciplines, London School of Economics and Political Science, London, UK.
Zhao, Hongbiao (2011) Portfolio credit risk of default and spread widening. The Author. (Unpublished)