I can’t decide whether to apply to the MS or the PhD program. Can I apply to one and be considered for both? Or, if I start as a MS student can I later join the PhD program?

Yes, you may apply to our PhD program and be automatically considered for both our MS and PhD programs. If you start as a MS student, you can always apply later for admission to the PhD program and not hinder any progress since any MS courses you take can be applied to the PhD degree. We have had several students begin the PhD program in this manner.