Everyone views SF and BOS as the economic juggernauts, as they should, but Philadelphia has been on a roll over the last year and a half over so.
Year over Year job growth has been fastest in the Philadelphia area compared to the other two:
https://www.bls.gov/regions/mid-atla...ages/37748.gif
Housing Prices in the city are spiking at ridiculous percentage that isn't matched anywhere:
The nation
Philadelphia's retail footprint dominated the country through Q1 2017, absorbing over 20% of all the new leased space in the US:
http://www.us.jll.com/united-states/...1-2017-JLL.pdf
The city still has a long road ahead in terms of righting the public school district, fixing some really old infrastructure, and creating a city that works for everyone, but I truly think Philly is on the right track on making the true underdog comeback.