Nuptiality changes have been at the core of demographic transitions in Europe and in several Asian societies [Caldwell (1993)]. Delayed marriages have been seen as precursors of fertility change in most societies. They underlie changes in family formation patterns and living arrangements, which ultimately are the bases of demographic transition. The concomitants of profound changes in marriage behaviour are worth studying because of their impact on demographic outcomes such as the population growth rate and fertility. Moreover, they are also strongly connected to the role and status of women, family living arrangements and power structures.