L'auteur souligne que, à cause des postulats implicites et explicites tant des modèles de causalité (path analysis) que des classifications de trajectoires professionnelles accomplies, ces deux approches ne peuvent être assimilées. En particulier, la seconde approche permet, contrairement à la première, de dégager des ensembles de causes ne s'appliquant qu'à certains sous-ensembles de la population.The author stresses that, on account of the explicit and implicit postulates underlying path models as well as classifications of occupational mobility trajectories, these two approaches cannot be assimilated. In particular, the second approach allows, contrary to the first, the identification of sets of causes applying only to certain subsets of the population.El autor señala que, a causa de los postulados implícitos y explícitos tanto en los modelos de causalidad (path analysis) que en los de clasificaciones de trajectorias cumplidas, esas dos aproximaciones no pueden ser asimiladas. En particular, la segunda aproximación permite contrariamente a la primera, destacar conjuntos de causas que solo se aplican a ciertos sub-conjuntos de la población
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