There was a brief phone interview after I applied online. It was fairly straightforward and asked simple behavioral questions. Overall, it was a fairly positive experience. I wish I had learned more about what role the interns have.
Applied online, got interview a few weeks later. Phone interview with current employee; went well and asked typical questions. Asked some questions about philosophy toward economic policy, as well as questions like "discuss a time you've failed"
I applied online. The process took 2 weeks. I interviewed at Tax Foundation
Interview
Phone interview. Asked several questions followed by periods of quiet until next question. Sent rejection letter in mail two months later. Not a very good experience as they seem very disorganized and overwhelmed.