Abstract
A better understanding of the link between consumption and life satisfaction has become a major stake for economists, who seek to find ways to improve the subjective well-being of people. But research results on the link between product and service consumption and life satisfaction are contradictory and depend on the kind of product, the country and time. The aim of this paper is to show the benefit of taking several moderators of the relationship between product satisfaction and life satisfaction into account: "product centrality", which can be defined as the importance and the impact of the product consumption on everyday life, "self congruity" and "lifestyle congruity". The results of three studies, one qualitative and two quantitative, show the effect of these three variables. Moreover, the influence of time on this relationship is studied.