PhD in the US compared to Europe I start my master studies this fall in quantitative finance/economics in Europe. Since this will just take 3-4 semesters I want to take a look ahead and obviously PhD is one option to do. 

So I am wondering if it makes sense to go to the US for PhD, since I will have already a master's degree in two years. I read a lot about the US PhD's which can be started after bachelor and therefore are somehow like a European master &amp; PhD combined. 

I saw some PhD programmes from well-known US universities and their curriculum contained almost just courses I will already have in my master. Wouldn't that be a waste of time to repeat them? Specially compared to my country (Switzerland) where a PhD duration is between 3-4 years.

Every input/personal experience will be appreciated.
I think in the end it will be a personal choice based on what you want in your career on where you may do your PhD. Based on some of the queries you had in the comparison between a US PhD or a European one, hopefully the following will be of help.

This link is a good page that shows the difference between the system in Europe and the US for PhD. The main reasons from it why a US PhD would be longer is;


  The main difference between doing a PhD in the US and most other countries is the coursework component. In the US, there is usually a requirement that PhD student complete at least 2 years of coursework before they start their independent research. This means that a PhD in the US will take longer to complete.


So yes there is a chance that you will be repeating coursework that you have done in your masters, but there is also the possibility that you may be able to get a wavier for coursework already completed.

I know (in Ireland at least, my home country) there is now a move in some universities towards a structured PhD that will include some coursework in year 1.

As per Piotr's comment it is typical that a PhD in Europe is pursed after Master's, while in US it contains Master's. In some cases in Europe it may be possible to go straight from a bachelor degree to a PhD. I know in my own case when starting out my advisor wondered if I would like to apply to complete a PhD instead of a Masters (in History). My sister also went straight from her bachelor to her PhD program (in mircobiology). Both these cases were in Ireland where you normally would have to have a first in your bachelor degree to be able to pursue a PhD directly afterward.

The page also details some other differences, such as how the committees are slightly different in both systems.

The Coimbra Group, an association of long-established European multidisciplinary universities have produced a Survey on PhD Programme Structures and Administration in Europe and North America that has some insightful information as well.