And as economies have slowed, inequality of income, in rich and poor countries, has widened.
Summers suggested the nation faces four major problem areas: energy, health care, inequality of income and continued strength of our financial system.
For instance, if people have different abilities, greater equality of opportunity something a government should promote might well lead to greater inequality of income.
However they also expect greater inequality of income and wealth, both within their own countries, with 60% predicting an increase, and internationally (58%).
The most striking change in American society in the past generation roughly since Ronald Reagan was elected President has been the increase in the inequality of income and wealth.
The point here is only that Americans do not seem to mind about the widening inequality of income and wealth as much as you might expect them to in current circumstances.
Meanwhile, politicians foment social division on the basis of income inequality, instead of attempting to improve mobility and opportunity through education reform, pro-growth policies, and an entrepreneur-friendly economy.
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That's an astonishing figure, and it is the highest level of income inequality since the beginning of the Great Depression in 1929.
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Gabon enjoys a per capita income four times that of most sub-Saharan African nations, but because of high income inequality, a large proportion of the population remains poor.
He gives short shrift to a wealth of well-known economic analysis on everything from the determination of consumer prices to the causes of income inequality which suggests that the impact of emerging economies is more nuanced than he allows.
The end result is that the inequality of wealth and income has grown dramatically not just among households but also across the divide separating large corporations from small businesses.
Moreover, she adds, the richest countries in the world also tend to have the greatest levels of income inequality, which has been linked to higher rates of depression as well as many other chronic diseases.
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With one of the highest rates of income inequality in the world, the result, in large part, of a rural, cashless subsistence economy, land reform is one of Namibia's most hotly contested issues.
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But the measures of income usually reported as showing rising inequality do not even include such transfer payments in their definition of income.
Its Gini index, a measure of income inequality, dropped from 0.63 to 0.52 from 1989 to 2009.
In a recent American Interest article, Cowen took up the related topic of income inequality.
Such tax returns consequently cannot give an accurate picture of income inequality or concentration.
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The longer run issues of income inequality and financialization would remain and require more fundamental reforms.
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The Census Bureau publishes the Gini Index, which is the official measure of income inequality.
If you measure inequality of wealth rather than income, the global pecking order changes.
Whether OWS will ultimately have an impact on the issue of income inequality is hard to say.
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The government has - contrary to some headlines - slowed the rise of income inequality right down.
Estimates vary, but single parenthood can account from somewhere from 15 to a full 40% of income inequality.
This unemployment conundrum intensifies in gravity when you consider the prospects of income inequality and generational differences in employment.
In terms of income inequality, America lags behind any country in old Europe.
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The problem of income inequality was worsening, thanks to enormous tax cuts that had been passed into law that spring.
But the larger issues of income inequality will dog them either way.
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The extreme inequality in the distribution of income remains a major drawback.
However, I thought a great deal was revealed when each candidate responded to the question of income inequality, particularly as applied to women in America.
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Though the report also warns of the growing number of income inequality, it also notes that the middle class is crucial in anchoring African economies.
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