From Columbia GSB website:
"All applications require two recommendations. If you have been working full-time for at least six months, one recommendation should be from your current supervisor. The second recommendation should be from either a former direct supervisor or from another professional associate, senior to you, who can add personal insight into your candidacy.
If you are a college senior or have worked full-time for less than six months, at least one, but preferably both, of your recommendations should be from a person who can comment on your managerial abilities. You may ask a summer employer or another person who you feel can objectively assess your professional promise. The second recommendation may be from a college professor.
Recommendation questions include:
What is your relationship to, and how long have you known the applicant? Is this person still employed by your organization? If not, when did he/she depart?
Please provide a short list of adjectives describing the applicant’s strengths.
Please compare the applicant’s performance to that of his/her peers. Does the applicant have the potential to become a senior manager?
How effective are the applicant’s interpersonal skills in working with peers, supervisors, and subordinates?
How does the applicant accept constructive criticism?
Comment on your observations of the applicant’s ethical behavior.
What do you think motivates the candidate’s application to Columbia Business School?
In what ways could the applicant improve professionally?
If you could change one thing about the applicant, what would it be?
Are there any other matters which you feel we should know about the applicant?
Please be aware, the Admissions Committee does require all application materials be submitted online, including recommendations."
You can also find this on their website under Admissions->Apply Now->Application Requirements->Recommendations (sorry, can't post links).
They also ask if you are:
* Truly Exceptional (top 2%)
* Outstanding (top 10%)
* Very good (top 20%)
* Good (top third)
* Average (middle third)
* Poor (bottom third)
for a variety of topics like Maturity, Verbal Communication, etc.