Alpha beta gamma   Frankfurt and Milan are alpha cities along with London Berlin is a gamma city Seemingly the authors have neither been to Frankfurt and Milan nice and rich cities but without any atmosphere of global importance nor to Berlin one of the most interesting cities Ive ever been to and which feels as urban as a city can feel Berlin gamma Frankfurt alpha Very strange Apparently the population of a city is more significant than academic rankings based on curious criteria London Berlin Madrid Rome Paris are the largest and in my opinion the most global and urban cities of the EU