Michael Hannan’s paper, for its part, has very strong links to industrial organization – in fact, I have long wanted to facilitate a discussion between organizational ecologists like Hannan and indutrial organization economists like Boyan Jovanovic, Steven Klepper, and Ariel Pakes – but it also has strong connections to organizational economics. The paper by Barbara Reskin and Denise Bielby is of course very closely related to labor economics – especially as practiced by economists like, say, Francine Blau and Claudia Goldin – and it again raises organizational issues. Finally, Granovetter’s paper speaks to an all-important subject in economics – markets!.