Which type of recommendation is preferred, academic or professional?

Either is fine. Our goal is to assess your critical thinking and problem-solving skills, your overall commitment and fitness for the PiLA program, and ultimately, your ability to thrive in and contribute to the kind of work and living environment in which you’ll find yourself as a PiLA Fellow. (*PLEASE NOTE: Princeton's application software only displays "Academic" and not professional in the recommendation form, but either type is welcome for PiLA)