Hello,
I am an aerospace engineering undergraduate from India. I'm in my final year of a dual degree program, i.e, I'll graduate with a Bachelors and a Masters.
I'm looking to apply to the US for graduate school in AE for Fall 2017, but I'm having a tough time deciding between fields of aerospace I want to pursue my higher studies in. It is common knowledge that a funded Masters is incredibly difficult to get, but a PhD offer comes with definite monetary support - in the form of TAships or RAships, or any other fellowships.
My question is, if I get accepted into a PhD program, would it be possible for me to change my PI? And if so, by would I be expected to make that decision?