<--- UK PhD is shorter than the US one simply because a master is a must before a UK PhD, while you can enter a US PhD directly after a bachelor.
the location of the school (and the graduate school structure) doesn't matter much. It is all about the academics reputation of the department, and the supervisor at the end.
Thanks a lot for your reply!~~那您能不能再具体说说到底这些academic reputation还有跟哪个导师对以后这条路到底有哪些方面的影响(我打算之后回国的)?以及我该如何判断衡量呢····现在这所学校在英国综排前8吧,但是好像商学院并没有很强大,ECON还可以。因为之前也只是有志往phd这条路上努力,现在突然有这个机会却发现自己什么都不了解,只能求助坛里大神了···非常感谢!