President taft’s passage of the mann-elkins act in 1910 continued roosevelt’s legacy of railroad reform by

strengthening the interstate commerce commission.
establishing the interstate commerce commission.
continuing to lower railroad rates.
reestablishing the practice of giving rebates to large companies.

The Mann-Elkins Act of 1910 strengthens the Interstate Commerce Commission. In addition, the act was one of the series of reforms done on the Progressive Era. The Act has provided the commission a greater power in regulating the telecommunications and wireless industry in the United States.

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.