Wal-Mart More Selective Than Harvard
From the NY Times, "A Great Year for Ivy League Schools, but Not So Good for Applicants to Them," the acceptance rates this year are as follows:
Columbia University 8.9%
Harvard University 9%
Stanford University 10.3%
Cal Tech 16.2%
Acceptance rate for job applicants at new Wal-Marts: 1-3% (e.g. 11,000 applications for 330 jobs at the first Wal-Mart inside the D.C. beltway, a 3% acceptance rate, read more here)
Conclusion: Wal-Mart is more selective than an Ivy League university, and turns away more job applicants than Harvard or Columbia turn aways students.