The economy grew more quickly during the gilded age than at any other time in us history. two factors that caused this growth were

The two factors were a great increase in steel production and an increase in the value of manufactured goods. (source: quizlet

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.