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Income inequality down between 1979 and 1989, and back up slightly between 1989 and 2004


Québec, October 2, 2007 – In Québec, the level of inequality in disposable income rose slightly between the cyclical peak of 1989 and the year 2004 (+ 1.4 points). That increase was due to the one in the level of inequality in market income, not offset by tax and transfers. In contrast, taking a look at the period between the cyclical peaks of 1979 and 1989, that level of inequality had dropped more steeply (- 2.7 points), due to both market income, tax, and transfers. These results were taken from the research report L’inégalité de revenu au Québec (1979-2004). Les contributions de composantes de revenu selon le cycle économique, published by the Institut de la statistique du Québec, and now available on the ISQ website.

This report presents a detailed historical perspective of disposable income inequality, measured using the Gini coefficient. The focus is on the contributions to the inequality of the income components: market income, tax and government transfers. In addition to the population comprised of the economic families in Québec, including unattached individuals, the report examines various subpopulations defined by the composition of the family (unattached individuals, couples with or without children, single-parent families) and by the age of the major income earner (under 30, 30-64, 65 and over).


The Institut de la statistique du Québec produces and disseminates relevant, reliable, and timely statistical information on the socioeconomic development of Québec. It is the central authority for the production and dissemination of official statistical information for Québec government departments and agencies. It is also responsible for conducting statistical surveys of general interest.

Sources :

  • Stéphane Crespo
    Phone: (418) 691-2411, Ext. 3105
    Research and socioeconomic planning officer
    Institut de la statistique du Québec

  • Information and Documentation Centre (ISQ)
    Phone: (418) 691-2401
    or 1-800-463-4090 (toll free in Canada and the United States)