Answer:
Increase
Step-by-step explanation:
-Over the past two decades, the share of income to the richest Americans has INCREASE than the share going to the poorest Americans.
The past two decades have the characteristic that had an industrial development which benefits the money income of big entrepreneurs.
Also, it is known that poverty in America has been increasing, nowadays there arenĀ“t the same job opportunities that americans used to call teh "American Dream", it is harder for people to get a good job or find a good growing opportunity without the educational development needed.