> A lot of reviewing for conferences is actually being done by Ph.D. students. They have to do it, whether they are on a stipend or not. Most (all?) PhD studen

> A lot of reviewing for conferences is actually being done by Ph.D. students. They have to do it, whether they are on a stipend or not. Most (all?) PhD students in science and engineering are on fellowships, at least in the US. Major research universities will not admit unfunded PhD students.