In this paper, we empirically measure the effect of the DIVX preannouncement in the DVD market. We do this by measuring the effect of potential (incompatible) competition on a network undergoing growth. We find that there are network effects in the DVD market and that the preannouncement of DIVX...

An accidental healthcare system -- Paging doctor Welby -- Therapy for an ailing health economy -- The managed care prescription -- Self-help -- The quality revolution -- Mending the safety net -- Reviving the American healthcare system