This finding is even more striking, say the authors, given that income inequality between the developing and developed world seems to have widened slightly.
In fact, he said the spread was more likely to widen going forward and as of Monday, it had widened slightly to 69 basis points, the lowest level since April 2010.
The last of these, issued in 2000, said that although the have-nots had made striking gains, the disparity among groups of different income levels remained and had widened slightly in some cases.
Wall Street welcomed a government report that wholesale prices declined more than expected, suggesting inflation remains well under control, and appeared unconcerned about news that the trade deficit had widened slightly.
By 2006, both Australia and Canada showed a narrower gap than that observed in 1981, while the gap for New Zealand had widened slightly.
Inequality in property wealth has widened very slightly – the Gini coefficient here has risen from 0.63 to 0.64, as house prices continue to polarise between London and the rest.
In the past two months, as bond yields jumped worldwide due to improving inflation and growth expectations, the gap between benchmark German Bund yields and Italian, Spanish or Portuguese borrowing costs over 10 years has widened only slightly.
In some states, No Child Left Behind has widened the racial achievement gap slightly.
The spread between top-rated paper and slightly riskier borrowing has widened to unprecedented levels, and some borrowers, including commercial banks, have been pushed out of the market altogether.
Republicans have long been slightly more likely than Democrats to say they are intensely patriotic, but the gap has widened dramatically, and is now by far the largest on record.
