I see. I meant that hardest part can be that initial 2 years of US-esque 5-year PhD. Overall, in US, PhD is student - teacher relationship, while in Europe, mos

I see. I meant that hardest part can be that initial 2 years of US-esque 5-year PhD. Overall, in US, PhD is student - teacher relationship, while in Europe, mostly, it is employee - employer relationship.