“…For these reasons, many studies have been carried out in several countries which analyse students' outcomes during university (see, e.g., McCall 1999, 2002;Smith and Naylor 2001;Montmarquette, Mahseredjian, and Houle 2001;Arulampalam, Naylor, and Smith 2004;Scott and Kennedy 2005;Bradley and Lenton 2007;Lassibille and Gomez 2009;Arias Ortiz and Dehon 2011). However, the temporal dimension has not always been considered, and when it is, it is not taken into account in a discrete framework, which is clearly needed in many educational inquiries, since the assumption of continuous time models -that the precise time of occurrence of an event is known -may be unrealistic in educational contexts (Singer and Willett 1993;Scott and Kennedy 2005;Arias Ortiz and Dehon 2011).…”