I spent a considerable part of yesterday looking at applications for our
Ph.D. program in theoretical computer science. Some of you readers
might have an interest in what I
look for in a potential graduate student. Keep in mind that
other professors may read the applications differently.
Judging Ph.D. applications is not an easy task. Most of our applicants
have near perfect grades (in math and TCS courses) and GRE scores (focusing on quantitative).
Next I read the letters of
recommendation. Nearly every recommender writes positive letters but
you can definitely see some differences. "Best student in the
past five years" means much more than "one of the top ten
graduating CS students this year." Recommendation letters carry
more weight if they show a personal contact not just "he took my
class." I also pay particular attention to letters written by
people I know, i.e., active members of the theoretical computer
science community.
I check to see if an applicant has done any research as an undergrad
(which helps but is not critical) and do a quick read of the statement
of purpose. I know applicants fret considerably about the statement of
purpose but in fact they carry very little weight. You can use them to explain
anomalies in the application (health problems in the semester you got
a C in algorithms). Trying to be clever can harm you. I remember one
applicant years ago started the statement with "I want to be a graduate student because
I don't want to work for a living."
Does it matter what undergraduate school you attended? We'll accept
a student from any university or college, but I keep the quality of
the school in mind as I evaluate the application.
Does it matter if you are a US citizen or even live in the US? Not
really, though many universities including the University of Chicago have strict lower limits on TOEFL scores for
incoming foreign students.
In short for me, assuming an applicant has good grades and scores, it is the letters of recommendation that make or break an application. Choose your letter
writers well.