| Summary: | The rise in the dissolution of civil unions has underscored the importance of studying the different risks faced by those who opt for a marriage or a cohabitation union in their first relationship. This article takes a new approach to this topic by distinguishing between divorces, marital separations, and cohabitation dissolutions. To this end, tables of union dissolutions were drawn up based on marital and cohabitation union cohorts from 1984 to 2016, categorized by the type of union and dissolution. Survival models (Cox’s proportional hazards models) were also estimated in order to examine the factors influencing each type of dissolution. The results show that the probabilities of divorce and marital separation are similar, while dissolutions of cohabitation unions show a different trend. Those who divorce or separate in a marriage form a selective, urban group with higher educational levels, and at an increased risk of dissolution when they first marry at an early age. In contrast, cohabitations unions present the highest levels of dissolution, regardless of the age of the first union, and their socioeconomic characteristics are associated with shorter marital durations. Of the variables analyzed, only the number of children consistently affects all the duration models.
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