A mainly Canadian economics blog
Yesterday saw an odd coincidence:
The Globe and Mail ran a bunch of articles about the 10-figure salaries earned by a small number of people (,,.
McMaster University's
passed along updated data ( and data files , , ) confirming the trend in which income is increasingly concentrated among a small number of people.
Three years ago, I
about the results that Mike published with Berkeley's Emmanuel Saez on the evolution of top income shares in Canada up to 2000. The updated numbers are not directly comparable to the ones in the AER study, but they show the same trends over the periods in which the two data sets overlap. Even better, they show what has happened to the concentration of after-tax income.
The basic story is that the trends identified in the earlier study have not reversed themselves since 2000. Here is how the pre- and post-tax income shares have evolved for the top ten per cent of the income distribution:
The top 10% increased its share of total income, but these gains were made entirely by those in the top 5%. The pre-tax share of those in the 90%-95% category didn't change, and the after-tax share of the 90%-95% group actually declined over this period.
So let's take a closer look at the top 5%:
The same pattern repeats itself: although those whose incomes fell between the 95th and the 99th percentiles saw an increase in their share of pre-tax income, their share of after-tax income fell. The gains in after-tax income were made by those in the top 1%.
So let's take a closer look at the top 1%:
And again, the pattern is repeated. Although those in the 99%-99.5% group saw modest increases in their share of total income, these gains were dwarfed by those in the top 0.5%.
When you zoom in on the top 0.5%, the pattern breaks down: both the 99.5%-99.9% and the top 0.1% see gains in both pre- and post-tax income.
Here is Mike's Table 1, supplemented with a summary of the changes of the shares in total and in after-tax income:
Fractile Lower
bound: 2007 Average
income: 2007 Pre-tax
share: 1982 Pre-tax
share: 2007 After-tax
share: 1982 After-tax
share: 2007
99.9-99.99
$1,843,601
$3,832,500
So the main thing to come away with is that the trend to higher income shares a the very top of the income distribution - particularly in the top 0.5% - is still ongoing.
There's more in Mike's paper, and I'll be coming back to this topic in a couple of days.
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