For all the hue and cry over Canada's richest 1 per cent, little is known about just who they are.

Until now. A new picture of that rarified club shows they are overwhelmingly men, older men in particular. They tend to have university degrees, and half of them work more than 50 hours a week. They're not, by any stretch, all bankers: they are also doctors, dentists, managers and veterinarians, who earn at least $230,000 a year to qualify.

A paper released last week by University of British Columbia economics professors sheds new light on income inequality trends in Canada, who the top earners are and what policies might best address the country's growing income gap.

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They find, broadly speaking, that income distribution has not been this uneven in Canada since "the dark days of the Great Depression."

"The ratcheting-up of inequality in Canada is real," the 43-page paper says. "Whatever else it achieved, the Occupy movement shone a light on our growing inequality."

Income inequality has been hotly debated in the past year, and a raft of recent studies has shown it is widening in most advanced economies. Growing income disparity has been linked with deteriorating outcomes for health-care, crime and long-term economic growth.

In Canada, about 8 per cent of the country's total income was concentrated in the hands of 1 per cent of the population back in the late 1970s. In recent years, that almost doubled to 14 per cent, the UBC paper said, which is based in part on details from the 2006 long-form census.

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Reasons for the growing chasm vary. The wage gap between those with a university degree and those with just high school is widening. Younger workers are facing worse earnings prospects than a generation ago. Outsourcing, declining unionization rates and technological change may also be playing a role.

Policies that could narrow the gap include closing tax loopholes, hiking taxes on the richest 1 per cent and increasing refundable tax credits to lower-income Canadians, the authors say. Making the education system more flexible and reducing high school dropout rates could help support the middle class.

Here are some more of the findings from the study, entitled "Canadian Inequality: Recent Development and Policy Options":

The paper was jointly written by UBC's Nicole Fortin, David Green, Thomas Lemieux, Kevin Milligan and Craig Riddell for the Canadian Labour Market and Skills Researcher Network.