Dear all, The next seminar in our series of statistics talks for people interested in quantitative methods in biology and medicine will take place on Thursday 24 March 2016. Exceptionally, it will take place at 15h00, in the room C4 at the level -1 from the Biopôle 1 (Route de la Corniche 2, 1066 Epalinges, M2 stop: Les Croisettes). The speaker will be Prof. Martin Huber from the Department of Economics, University of Fribourg, Switzerland. Title: Endogeneity and non-response bias in treatment evaluation - nonparametric identification of causal effects by instruments Abstract: This paper proposes a nonparametric method for evaluating treatment effects in the presence of both treatment endogeneity and attrition/non-response bias, using two instrumental variables. Making use of a discrete instrument for the treatment and a continuous instrument for non-response/attrition, we identify the average treatment effect on compliers as well as the total population and suggest non- and semiparametric estimators. We apply the latter to a randomized experiment at a Swiss University in order to estimate the effect of gym training on students'self-assessed health. The treatment (gym training) and attrition are instrumented by randomized cash incentives paid out conditional on gym visits and by a cash lottery for participating in the follow-up survey, respectively. Hope to see you there! Valentin (for the organizers: Jérôme Goudet, Valentin Rousson, Frédéric Schütz) CHUV centre hospitalier universitaire vaudois Valentin Rousson - Division biostatistique et méthodes quantitatives IUMSP - Institut universitaire de médecine sociale et préventive BIO 2/2ème/103 Rte de la Corniche 10, CH - 1010 Lausanne +41 (0)21 314 7328 valentin.rousson@chuv.ch www.iumsp.chhttp://www.iumsp.ch/