"income divergence" is correct and usable in written English.
You can use this phrase in a sentence to refer to the widening gap between different levels of income. For example, "The income divergence between the wealthy and the poor has been increasing in recent years."
It isn't a natural force for convergence at all, but must be actively cultivated (and may be resisted by those with wealth and power).At the moment, Mr Piketty observes, the world is looking at two key dynamics pushing the world toward greater income divergence.
In any event, according to the researchers, the shallower penetration of new technologies in the third world explains of their economic lag: "changes in the pattern of technology diffusion account for 80 percent of the Great Income Divergence between rich and poor countries since 1820".
Using the novel methodology, the economists documented income divergence in India.
However, studies show that despite the convergence of income and divergence of information technology, consumer choices are increasingly irrational.
Expressed as a percentage of pre-tax income, the divergence in outcomes is less dramatic, but the Romney proposals still appear highly regressive.
But is widening income inequality behind the divergence in longevity over the last three decades?
In the United States there is evidence of a divergence in income between those with a four-year degree and those with more advanced credentials (Autor 2014).
As EPI notes, that divergence in income growth, especially noticeable since 1979, corresponds with a decline in union influence, as an increase in union membership would help to boost worker incomes.
Even deeper trends, going back decades to the rise of pro-business, anti-regulation lobbyists and the decline of unions, as recounted in Timothy Noah's book on income inequality, The Great Divergence, helped shape the decline of the middle and working class in America, laying the groundwork for disenfranchised whites to be Trump's key base of support.
Then when you factor in the 'great income disparity' or Great Divergence that we've seen since 1980, diligently expressed by Tim Noah on CBS Sunday Morning, this is the other talking point that needs to get out there... the 1% have done enormously well.
