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The PhD Application from a Faculty’s Perspective

The PhD admissions process at top CS departments is highly competitive. I think it is helpful to understand the PhD admissions process from the faculty’s perspective, and what is prioritized. It assumes a department where students are admitted by specific faculty rather than to the department as a whole. This is from my perspective based on what I see. It may not be representative and you may disagree.

Axioms

• In round numbers, a PhD costs $100K/year over 5 to 6 years, or a total of $500-600K.
• The faculty member pays for the PhD.
• # applicants grows each year; # applicants » # PhD spots.
• Broadly, the goal of research is to make the highest impact on the world by creating new knowledge.
• Every lab has different definitions of what impact means.
• Research involves many skills including:
  • understanding literature
  • identify value
  • formulate problems
  • design, implement, evaluate novel solutions
  • ability to write

Basic implications:

• Every year, a faculty member has less time per application.
• The PhD application is a competition.
• The PhD is an investment to maximize research impact given fixed $$ and finite time.

Thus, the purpose of the application is to quickly convince the faculty that you will maximize their lab’s research impact as compared to other applicants.

The statement of purpose is not about your life story, or a list of what you have done, or how are generally interested in the faculty’s research area. It is to quickly provide concrete evidence that you will be the best at conducting research in the faculty’s lab under their definition of impact.

Further implications and how they apply to a PhD application is left as an exercise to the reader.

Some basic tips

• Understand some research project in the lab. Have something to say about it
• Understand how to approach the application
• Questions about the lab? Ask the faculty’s PhD students.