Re: Rich-poor gap

["Nguyen Tien Zung" <tienzung@darboux.math.univ-montp2.fr>]

No, a good measurement of the gap is not the difference of the income
numbers
as you wrote, but the difference of their logarithms. Even so, the gap
increase does not
necessarily mean unjustice, if the civil rights of the poor are protected
and the poor
are not excluded from the society. 

Z

> I earn 200USD/year. My friend earns 500USD/year. The gap is 
> 300USD/year. Suppose the economy is growing so that in 5 years
> I double my income to 400USD/year. If my friend also doubles his
> income, it is quite `fair'. But the gap has now grown to 600USD/year. 
> 
> Perhaps *other parts* of the growth of the rich-poor gap
> is unjust. I don't know...
> 
> Huy