Delgado, Miguel A.2010-07-152010-07-152009-09Journal of Econometrics, 2009, 152, 1, p. 1-20304-4076https://hdl.handle.net/10016/9081application/pdfengRecent Advances in Nonparametric and Semiparametric Econometrics: Honouring Peter M. Robinson: Editor's Introductionresearch articleEconomÃa10.1016/j.jeconom.2009.02.008open access