Emilio Castilla and others have studied the movement of employees among the VC firms in Silicon Valley vs. Route 128 (http://www.stanford.edu/group/esrg/siliconvalley/docs/siliconvalleyedge.pdf)
Has anyone at YC or outside looked at the movement of employees and founders from failed YC startups to other YC startups? While no one in YC wants any of their peers to fail, I would imagine that the failed startups provide an ample base of talent from where other startups can hire from. Do you guys have any numbers on how much talent "stays in the family"?