I have a friend who's family is from Pittsburgh but I have never gone, have you? It's a city in Pennsylvania.
Pittsburgh ? Its a lovely city I suppose..I hope to visit someday
It's known as the steel city for all its business related to steel! I guess that's pretty cool 
Wow! Steel added a great impetus to the industrial revolution of the early 60's ,especially the locomotives.
Yep! Also for some of the 1900s Pittsburgh was only behind NYC and Chicago in corportate headquarters employment, so lots of jobs!
That's an an advancement in development I suppose. Employment shows an economic growth rate
Well economic growth is always really important! 
So what's determines economic growth esp . in attaining equilibrium?