Journal article: Starting from a classification of homogenous socioeconomical classes, the study shows that between 1969 and 2008 the consumption structures of Canadian households are very differentiated across classes, and that the hierarchy of these structures mimics that of social statuses. Class means tend to converge since the beginning of the 1970s, but within classes the consumption structures have grown more heterogenous, thus making socioeconomic classes less pertinent to explain differences in consumption patterns. In order to analyze these differences, we build a pseudopanel drawing from seven Canadian household expenditure surveys in order to estimate long-term demand functions. The differences in estimations between the cross-section and the time dimensions can be used to reveal the non-monetary constraints that influence households’ consumption behaviour. We find variegated evolutions of these constraints across consumption categories, that are coherent with an analysis in terms of time-cost of consumption.