Real, anonymous reports from people who interviewed for Business Analyst at Cornerstone Research, newest first and distilled into what to expect across the loop.
I went through a tough but structured two-stage process that culminated in a long in-person superday, moving from broad case work to more technical economic reasoning over ~2–4 weeks.
I experienced a difficult process where the cases were interviewer-led but heavily technical on economic concepts—especially when I had limited econ background—over roughly a month.
The interview process typically consists of two main rounds: an initial virtual round with back-to-back interviews followed by an in-person superday featuring multiple case and behavioral interviews, spanning approximately 2-4 weeks.
Candidates can expect case interviews to heavily emphasize economic reasoning and econometrics, requiring a solid understanding of economic principles and the ability to analyze data under time pressure.
Behavioral questions are integrated throughout the interviews, often mixed with case discussions, requiring candidates to articulate their motivations and experiences clearly while demonstrating fit with the company's culture.
The interview style varies, with some candidates experiencing supportive interviewers while others report less engagement; maintaining a clear and confident reasoning approach is crucial regardless of interviewer demeanor.
Candidates should prepare extensively on core economic concepts and case methodologies, as success hinges on quick comprehension and application of these ideas during interviews.
While many candidates do not receive offers, common takeaways include the importance of consistent performance across all interview segments and the need to adapt to varying interviewer styles and expectations.