NY is not too stingy with their stats:
"For Fall 2006, we received over 900 applications and will enroll 25 new students. We evaluate the quality of the undergraduate and graduate schools, grades earned and courses taken, letters of reference, and test scores. In addition, we may interview final candidates to be sure that NYU is the appropriate school for them.
The average GMAT score for the Fall 2006 entering class is 721. GMAT scores are mentioned because they are an easy number to summarize. As stated earlier, test scores are only one of the elements we consider. We accept the students whom we feel have the aptitude, background and motivation to produce first quality research in the future.
We receive about 300 applications in Finance and enroll 4-6 students per year. In each of the other disciplines we receive 40 to 100 applications and enroll 2 to 4 students per year. The business schools with the top doctoral programs regularly exchange admission statistics. Stern’s admission data are typical of the top five programs in the country."
From Northwestern/Kellog:
About 25 new students are chosen from more than 600 applicants. The program is full-time on the Evanston campus; part-time or distance-learning study is not available.