Social Accounting Matrices (SAM) are a numerical scheme of the circular flow of
income. SAM-based multipliers can be used to determine changes in the relative income
of economic agents. In this paper we investigate the process of income distribution in the
Catalan economy, using the linear model of SAM multipliers. We also present an additive
decomposition of the distributional incidence measurement provided by Roland-Holst and
Sancho (1992). With this decomposition we can identify the various components in the
overall process of income distribution among the agents of an economy. The approach pays
special attention to the role of government in the process of income distribution.