Steven, I guess the EU has a bigger catchment area for students so an imbalance isn't suprising; have you checked the same statistics for, say, Germany? Don't forget the cream of those students may stay for additional research projects at Imperial, UCL, Kings, Oxbridge, etc or join UK companies (well, those that can stay post Brexit :-( ). And some may go to institutions such as ESA, CERN, Eumetsat, etc that the UK is a partner in.Add to that the number of US researchers that are apparently looking for jobs in Europe because of the hostile environment for science there (cuts in NASA and other science institutions' budgets, climate denial, vaccine skepticism, cuts in environmental work, ...) and can contribute to European research. To match US and Chinese research Europe needs to combine its resources. Don't forget research breeds Innovation that should attract innovation and, when applied to real world problems, generate wealth. I suppose long term the UK could also benefit from the Turing scheme but it's a lot easier to work with our neighbours where we've helped create collaborative ventures already ...
Michael Ixer ● 2d