Identification of Treatment Effects Using Control Functions in Models with Continuous, Endogenous Treatment and Heterogeneous Effects (with J.P. Florens, J. J. Heckman and E. Vytlacil) Econometrica Volume 76 Issue 5 , Pages 1191-1206 (September 2008)
Changes in the Distribution of Male and Female Wages Accounting for Employment Composition Using Bounds (with Richard Blundell, Amanda Gosling and Hidehiko Ichimura), Econometrica, Volume 75, Issue 2, Date: March 2007, Pages: 323-363
Moment Conditions for Dynamic Panel Data Models with Multiplicative Individual Effects in the Conditional Variance (with Frank Windmeijer) Annales d’ Economie et de Statistique.
Female Labour Supply and on the Job Search: An empirical Study using Complementary Data Sources. (with M. Arellano) Review of Economic Studies July 1992, 59 pp 537-557
Bivariate Alternatives to the Tobit Model (with R.W. Blundell) Journal of Econometrics,1987.