<p>This paper explores dimensions of patterns and recent trends of family labor supply in Brazil, with a specific focus on the role of changes in family arrangements. Specifically, we investigate the added worker effect and the discouraged worker effect for married women, over time and generations. By estimating multinomial probit models with appropriate corrections of sample selectivity, using microdata from a large household sample survey between 2002 and 2015, we were able to assess whether the demographic transition processes translated into changes in family composition generated changes in the main determinants of the labor supply of married women. The findings suggest that the process of activation in the workforce (transition from inactivity to occupation or unemployment) for married women in younger generations seems to depend less on the working conditions of the head of the household than on individual and household characteristics. We also find it is hardly possible to draw a parallel between demographic changes and the discouraged worker effect and, furthermore, the activation of married women seemed to be countercyclical over the years. Our conclusions strongly point to need of inclusion of include a generational component for the analysis of the hypothesis of added worker effect, i.e., the added worker effect of married women is increasingly irrelevant to the economic well-being of many households given the increasing presence of dual-earner families. The conditions that shape individual and joint decisions of labor supply also are continuously changing and this seems to be even more relevant for the post-pandemic scenarios.</p>