Answer:
The most significant effect of the industrialization on the US Economy from 1877-1900 is the mass movement of population to the large cities and away from rural areas. You will find significant population increases in the northern industrial cites. A second effect would be a significant shift in wealth. Before Industrialization, a majority of the most wealthy Americans were people who owned large farms. As a result of industrialization, you have people like Rockefeller, Carnegie, and many other captains of Industry make their huge fortunes. A 3rd effect is that Industrialization made the United States a player on the World Scene. The US became a World Power because of the industrialization thus leading to the Spanish American War, the building of the Panama Canal, and eventually WW1.